ENR 1.4 ATS AIRSPACE CLASSIFICATION AND DESCRIPTION

1  ATS Airspace Classification
1.1 Within the UK FIR and UIR, Airspace is classified as A, C, D, E, F and G in accordance with Standardised European Rules of the Air, subject to the Differences notified at GEN 1.7. The Airspace Classifications are described in subsequent paragraphs.
1.2 ALL Class A, C, D and E Airspace is hereby notified for the purposes of the UK Air Navigation Order.
1.3 Where controlled airspace is vertically adjoined by Class G airspace, aircraft operating at the base (lower limit) of a control area or at the upper limit of a control zone or control area should comply with the requirements of Class G airspace. With the exception of VFR flights operating into or out of Class E airspace and where appropriate, complying with any applicable TMZ requirement, flights without an ATC clearance that are observed operating immediately above the base (lower limit) of a control area or immediately below the upper limit of a control zone or control area will be considered to have infringed controlled airspace.
1.4 When considering the vertical profile of a flight within Class G airspace, pilots are reminded to select a level that is compliant with SERA.5025(a) and ORS4 No 1423. In order to mitigate the risk of infringing controlled airspace, pilots are recommended to plan their flights to operate:
  1. not closer than 2 NM from the boundary of controlled airspace.

  2. at least 200 FT above the upper limit of Control Zones, Control Areas including TMAs.

  3. at least 200 FT below the lower limit of a Control Area, including TMAs.

1.5 When operating proximate to control areas in turbulent, or in ascending or descending air masses, as part of effective Threat and Error Management, when able to, pilots may wish to consider increasing the 200 FT recommended spacing to mitigate inadvertent vertical deviations that could result in an infringement.
1.6 Pilots are further reminded that, when operating within Class G airspace within 500 FT of the base of controlled airspace, they should consider the risk of encountering wake turbulence generated by aircraft operating at the lowest available level within the controlled airspace above.
1.7 Pilots operating in Class G airspace are encouraged to obtain an appropriate air traffic service (see ENR 1 sections 2.3 and 2.4 or CAP 774 – UK Flight Information Service) from the designated air traffic service unit. Pilots who operate within Class G airspace, especially those who operate proximate to the boundary of controlled airspace, and have chosen not to obtain a suitable ATS in an aircraft fitted with a serviceable transponder are reminded to:
  1. monitor the appropriate ATS frequency whilst displaying the corresponding frequency monitoring code; or

  2. display the appropriate conspicuity code.

2  ATS Airspace Description
2.1  Class A - Controlled Airspace

IFR

VFR

Service

Air Traffic Control Service.

VFR FLIGHT

Separation

Separation provided between all IFR flights by ATC.

ATC Rules

Flight Plan required (See Note 1);

ATC clearance required;

Radio Communication required;

ATC instructions are mandatory.

NOT

VMC Minima

At and above FL 100:

  • 8 KM flight visibility

    1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

  • 5 KM flight visibility

    1500 M horizontal and 1000 FT vertical distance from cloud.

(See Note 2)

PERMITTED

Speed Limitation

As published in procedures or instructed by ATC.

Note 1: In certain circumstances, Flight Plan requirements may be satisfied by passing flight details on RTF (detailed at ENR 1.10).

Note 2: For the purposes of:

  1. Climbs and descents maintaining VMC;

  2. Powered aircraft - Airways crossings (ENR 1.1, paragraph 1.6.1.6.1);

  3. Powered aircraft - other penetrations of Airways (ENR 1.1, paragraph 1.6.1.6.2).

2.1.1  Notifications
2.1.1.1 The following Airspace is notified Class A Airspace:
  1. All Control Areas below FL 195 as notified within the UK FIR With the exceptions listed below:

    1. Those parts which lie within the boundaries of the Belfast TMAs/CTRs and Scottish TMAs;

    2. Strangford CTA;

    3. Holyhead CTA;

    4. Argyll CTA;

    5. Moray CTA;

    6. Borders CTA 5, 9, 10, 11, 12, 13 & 14;

    7. Tay CTA 10, 11, 12 & 13;

    8. Berry Head CTA 7;

    9. Clacton CTA 8;

    10. Cotswold CTA 2;

    11. Daventry CTAs 21 and 22;

    12. Portsmouth CTA 3;

    13. Yorkshire CTA 17.

    (See also ENR 1.4 paras 2.3.1.1 and 2.4.1.2).

  2. Channel Islands Terminal Control Area (North and South);

    Outside the notified hours of watch of the Jersey Air Traffic Control Unit:

    1. Those parts of the Channel Islands TMA (South), which lie within the Brest FIR are notified as Class E Airspace and are controlled by Brest ACC.

    2. Those parts of the Channel Islands TMA (North) which lie within the London FIR and are located below the lower limits of the Berry Head and Portsmouth CTAs are notified as Class G Airspace.

  3. Shanwick Oceanic Control Area;

    The Shanwick, Santa Maria, New York and Reykjavik Oceanic Control Areas are hereby notified pursuant to the UK Air Navigation Order at and above FL 55 for the purposes of ICAO Annex 11 Chapter 2 para 2.6.1 and SERA.6001(a) Classification of Airspaces Class A.

2.1.2 Glider operations in Class A Airspace

In certain notified portions of Class A airspace, gliders are permitted to operate without reference to ATC in accordance with specified conditions and neither separation nor traffic information will be provided in respect of such flights. When such activity occurs, such airspace will be segregated from other traffic, which is provided with at least standard separation from the segregated airspace. Such segregated activities are undertaken in accordance with the flexible use of airspace provisions contained within Commission Regulation (EC) 2150 of 2005.

2.2  Class B - Controlled Airspace

IFR

VFR

Service

Air Traffic Control Service.

Separation

Separation provided between all flights by ATC.

ATC Rules

Flight Plan required (See Note);

ATC clearance required;

Radio Communication required;

ATC instructions are mandatory.

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Speed Limitation

As published in procedures or instructed by ATC.

Note: In certain circumstances, Flight Plan requirements may be satisfied by passing flight details on RTF (detailed at ENR 1.10).

No UK Airspace is currently designated Class B.

2.3  Class C - Controlled Airspace

IFR

VFR

Service

Air Traffic Control Service.

Separation

Separation provided between all IFR flights by ATC.

All VFR flights separated from all IFR flights by ATC.

Traffic information provided on other VFR flights and traffic avoidance advice on request.

ATC Rules

Flight Plan required (See Note);

ATC clearance required;

Radio Communication required;

ATC instructions are mandatory.

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Speed Limitation

As published in procedures or instructed by ATC.

Below FL 100:

250 KT IAS;

OR

lower when published in procedures or instructed by ATC.

Note: In certain circumstances, Flight Plan requirements may be satisfied by passing flight details on RTF (detailed at ENR 1.10).

2.3.1  Notifications
2.3.1.1 Above FL 195 all airspace in the London and Scottish FIRs is notified as Class C Airspace. This includes all Control Areas and TMAs above FL 195 as notified within the UK FIR and Upper Airspace Control Area - the London and Scottish UIR between FL 245 and FL 660 (which includes Free Route Airspace).
2.3.1.2 Below FL 195 the following Airspace is also notified as Class C Airspace:
  1. Berry Head Control Area 7;

  2. Cotswold Control Area 2;

  3. Daventry Control Areas 21 and 22;

  4. Holyhead Control Area (excluding CTAs 15 and 16);

  5. Portsmouth Control Area 3;

  6. Severn Control Areas 1 and 2;

  7. Clacton Control Areas 10, 11 and 12.

2.3.2  VFR Flight in Class C Airspace
2.3.2.1 General arrangements for VFR flight in Class C airspace are specified at ENR 1.1, sub-section 4.
2.3.2.2 Specific arrangements for glider operations within Temporary Reserved Areas in Class C airspace above FL 195 are detailed at ENR 1.1, paragraph 1.11 (Charts see ENR 6-64 and ENR 6-65).
2.4  Class D - Controlled Airspace

IFR

VFR

Service

Air Traffic Control Service.

Separation

Separation provided between all IFR flights by ATC.

Traffic information provided on VFR flights and traffic avoidance advice on request.

ATC separation not provided.

Traffic information provided on IFR flights and other VFR flights; traffic avoidance advice on request.

ATC Rules

Flight Plan required (See Note 1);

ATC clearance required;

Radio Communication required;

ATC instructions are mandatory.

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Alternatively, during day only, at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher (See Note 2):

  1. For aircraft other than helicopters, flying at 140 KT IAS or less:

    5 KM flight visibility

    Clear of cloud and with the surface in sight.

  2. For helicopters, flying at 140 KT IAS or less:

    1500 M flight visibility

    Clear of cloud and with the surface in sight.

Speed Limitation

Below FL 100:

250 KT IAS;

OR

lower when published in procedures or instructed by ATC.

Note 1: In certain circumstances, Flight Plan requirements may be satisfied by passing flight details on RTF (detailed at ENR 1.10).

Note 2: The VMC criteria stated in the table above for flight by day at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher, reflect changes from SERA.5001 Table S5-1, as enabled through the Aviation Safety (Amendment) Regulation 2021.

2.4.1  Notifications
2.4.1.1 The following airspace is notified as Class D Airspace during the notified hours of watch of the appropriate Air Traffic Control Unit.

Aberdeen Control Zone/Control Area (Notes 1 and 2(a));

Balder Control Area (Note 3);

Belfast Control Zone;

Belfast Terminal Control Area;

Belfast/City Control Zone/Control Area;

Birmingham Control Zone/Control Area;

Borders Control Area 5, 9, 10, 11, 12, 13 & 14;

Bournemouth Control Zone (Note 1);

Bristol Control Zone/Control Area;

Brize Norton Control Zone;

Cardiff Control Zone/Control Area;

Channel Islands Control Zone/Control Area;

Doncaster Sheffield Control Zone/Control Area (Note 1);

East Midlands Control Zone/Control Area;

Edinburgh Control Zone/Control Area (Notes 1 and 2(b));

Ekofisk Control Area (Note 3);
Farnborough Control Zone/Control Area (Note 1);

Glasgow Control Zone/Control Area (Notes 1 and 2(b));

Isle of Man Control Zone/Control Area (Note 1);

Leeds Bradford Control Zone/Control Area (Note 1);

Liverpool Control Zone/Control Area;

London Control Zone;

London/City Control Zone/Control Area;

London Gatwick Control Zone/Control Area;

London Luton Control Zone/Control Area;

London Stansted Control Zone/Control Area;

Manchester Control Zone/Control Area;

Newcastle Control Zone/Control Area (Notes 1 and 2(b));

Norwich Control Zone/Control Area (Note 1);

Prestwick Control Zone/Control Area (Note 2(b));

Scottish Terminal Control Area as shown at ENR 6-37;

Solent Control Area (Note 1);

Southampton Control Zone (Note 1);

Southend Control Zone/Control Area;

Strangford Control Area below FL 195;

Sumburgh Control Zone/Control Area (Note 2(c));

Tay Control Area 10, 11, 12 & 13;

Teesside International Control Zone/Control Area;

Yorkshire Control Area 17.

Note 1

Notified as Class D Airspace for the purposes of SERA.6001 Classification of Airspaces, during the notified hours of watch of the appropriate Air Traffic Control Unit subject to the conditions in Note 2.

Note 2

  1. An aircraft without radio equipment must not fly in Class D Airspace during the notified hours of watch of the appropriate air traffic control unit unless it has been otherwise authorised by the appropriate air traffic control unit and is subject to the conditions at paragraph (c).

  2. An aircraft without radio equipment and flown in accordance with the Instrument Flight Rules must not fly in Class E Airspace during the notified hours of watch of the appropriate air traffic control unit unless it has been otherwise authorised by the appropriate air traffic control unit and is subject to the conditions at paragraph (c).

  3. For the purposes of paragraphs (1) and (2), the conditions are that the aircraft must:

    1. only fly during the day;

    2. only fly within notified controlled airspace notified for the purpose of this paragraph;

    3. remain at least 1500 M horizontally and 1000 FT vertically away from cloud and in a flight visibility of at least 5 KM;

    4. comply with any electronic conspicuity requirements specified by the air traffic control unit; and

    5. comply with any other conditions specified by the appropriate air traffic control unit.
      (As applied to the Isle of Man by the Civil Aviation (Subordinate Legislation) (Application) (No 2) Order 1996).

Note 3

  1. Balder CTA, Ekofisk CTA and Ekofisk RMZ.

    At Polaris ACC (SG West), Sector Offshore is manned with Air Traffic Controllers and a Flight Data Operator (FDO), working frequencies 125.550 MHz, 134.200 MHz and 125.875 MHz, for Ekofisk RMZ 130.550 MHz. Sector Offshore may be split into 2 or 3 working positions when decided by the Supervisor. Due to the nature of surveillance measures, including the mandate for the carriage and operation of ADS-B transponders, associated with the airspace in which the provision of Air Traffic Services has been delegated by the UK to Norway in conjunction with the introduction of the Balder CTA and Ekofisk CTA within the UK FIR, the following procedures outline the agreed access arrangements.

    1. The UK MOD reserves the right of access to such airspace for State aircraft regardless of their equipage or ability to comply with the requirements set out by the delegated service provider; for:

      1. Aircraft in an emergency;

      2. Aircraft involved in National Security tasks, where possible under the positive control of either: Land, Maritime or Airborne Units;

      3. Aircraft engaged in Maritime operations, under positive control;

      4. For Ekofisk RMZ; unless in an emergency, when an emergency squawk may be required, aircraft under positive control will wear a listening squawk of 0455 whilst monitoring 130.550 MHz when inside the RMZ. The Queen Elizabeth (QE) Class aircraft carriers may wish to utilise dedicated squawks subject to co-ordination with Offshore Sector 20 Ekofisk as per para (c).

      Under such circumstances UK State aircraft will operate within the subject airspace under ‘due regard’ procedures in accordance with Article 3d to the Convention of International Civil Aviation.

    2. Specific procedures to enable UK MOD (including UK based USAFE) aircraft to conduct normal operational training sorties are detailed below.

  2. Procedures for Coordination of Operational Air Traffic (OAT).

    1. Coordination of Planned OAT Exercises. Planned military OAT exercises within the Area of Common Interest (see relevant section of LOA) should be coordinated with Polaris ACC SG West at least 24 hours prior to the start of the exercise, with a request for Special Use Airspace (SUA) for the planned exercise. In a normal offshore helicopter traffic situation (priorities may need to be defined) Polaris ACC SG West will give an approval for the SUA request.

      The SUA request shall contain:

      1. The lateral and vertical limits of the Exercise Area;

      2. The time for start and finish of the Exercise, including means of activation and deactivation of the Exercise Area;

      3. Contact information for the Exercise Coordination Unit;

      4. Other operational information related to the Exercise, such as number of aircraft involved, if applicable.

    2. Special Procedures for Coordination of OAT Operations.

      1. Purpose. Outwith Exercise scenarios, when MOD OAT requires to operate within the Area of Common Interest (ACI), the OAT will normally require to be controlled by a MOD Operational Control Unit (OCU) during the operations. OAT operations within the ACI are to remain outside of the lateral limits of Helicopter Traffic Zones (HTZ).

      2. The following coordination procedures are to be applied between UK MOD units and Polaris ACC SG West in respect of OAT carrying out operations and training within the ACI when prior co-ordination of the OAT operations is not applicable. The procedures are designed to ensure safe operations for both civil offshore helicopters and OAT operating simultaneously within the ACI.

      3. Procedures for OAT Coordination. When OAT operations are required within the ACI, the appropriate UK MOD OCU or the OAT planning to enter the ACI, shall contact the appropriate sector at Polaris ACC SG West, on the appropriate frequency or telephone line, prior to entering the ACI, with the following information, where applicable:

        (aa) MOD OCU or OAT callsign;

        (bb) The estimated position and a time for the OAT entering the ACI;

        (cc) Expected direction and estimated period of time for the OAT operations within ACI;

        (dd) The lateral and vertical limits of the Operating Area;

        (ee) Maximum altitude for the OAT operations within ACI;

        (ff) Radar transponder status, including SSR code, if applicable (aircraft may not be ADS-B-out equipped);

        (gg) Other information, such as contact information to the MOD OCU.

      When OAT operations within the ACI are finished, the appropriate MOD OCU or the OAT shall contact the appropriate sector at Polaris ACC SG West, on the allocated frequency or telephone line, to deactivate the OAT operations within the ACI and release the airspace for civil helicopter operations.

  3. Communications.

    1. Exchange of Operational Air Traffic Information.

      1. Means of Communication.

        (aa) Equipment.

        Fixed Communication with Polaris ACC SG West via public telephone lines (see para (c)(2)) or Mobile VHF Communication with Polaris ACC SG West (see para (c)(3)).

      2. Telephone Coordination. Exchange of Airspace Requests, flight plan data, estimates and other OAT-messages by telephone shall be carried out in accordance with the tables below:

        (aa) Messages to Polaris ACC SG West.

        Switchboard: +47 51 65 8000

        Supervisor: +47 51 65 8142

        Sector Offshore (FDO): +47 51 65 8155

        Sector Offshore (ATCO): +47 51 65 8232

        Telefax: +47 51 65 8154

      3. VHF RX/TX Communication

        ATC Sector

        R/T Callsign

        Frequency

        Hours of Operation

        Offshore Sector 20 Ekofisk

        Polaris Control

        125.875 MHz

        0600-2030 Mon-Fri*

        Offshore Sector 21 Balder

        Polaris Control

        134.200 MHz

        0600-2030 Mon-Fri*

        Offshore Sector 22 Statfjord

        Polaris Control

        125.550 MHz

        H24

        Note: *Published opening hours are in UTC. During summer time period 1 hour earlier.

        ATS Offshore is provided by Polaris ACC SG West Sector South (Sector 20 and 21) and Sector North (Sector 22) outside Sector Offshore opening hours.

2.5  Class E - Controlled Airspace

IFR

VFR

Service

Air Traffic Control Service.

Traffic information in accordance with UK FIS (Basic Service or Traffic Service) - see ENR 1.1, ENR 1.6 and Civil Aviation Publication (CAP) 774 - UK Flight Information Services.

Separation

Separation provided between all flights by ATC.

Whenever practicable, traffic information is provided on VFR flights and if requested by the pilot or if deemed necessary by the controller, traffic avoidance advice will be suggested (See Note 3 and 4).

None.

ATC Rules

Flight Plan required (See Note 1 and 2);

ATC clearance required;

Radio Communication required;

ATC instructions are mandatory.

None.

However, pilots are encouraged to contact ATC and comply with instructions.

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Speed Limitation

Below FL 100:

250 KT IAS;

OR

lower when published in procedures or instructed by ATC.

Note 1: In certain circumstances, Flight Plan requirements may be satisfied by passing flight details on RTF (detailed at ENR 1.10).

Note 2: Pilots of IFR flights will be advised when they enter and leave Class E airspace if the flight is an unplanned diversion or no flight plan has been filed prior to requesting a clearance to enter controlled airspace.

Note 3: Pilots of IFR flights and VFR flights receiving an ATS should be aware of the existence of factors that might adversely affect the ability of a controller to detect a collision hazard and provide timely and accurate traffic information and/or traffic avoidance advice within class E airspace. Such factors include:

  1. The inability of an ATSU to restrict the volume of VFR flights operating within class E airspace;

  2. The inability of an ATSU to anticipate changes in the flightpath of every VFR flight;

  3. The inability of an ATSU to detect collision hazards on every occasion because of surveillance clutter;

  4. The inability of an ATSU to provide timely transmissions on every occasion because of RTF congestion;

  5. The expectation that pilots receiving an ATS will respond appropriately following receipt of traffic information; and

  6. The requirement for the provision of an air traffic control service to have precedence over the provision of flight information service (SERA.9001(c)).

Note 4: Pilots must consider the need for traffic avoidance advice upon receipt of traffic information. Pilots who require traffic avoidance advice must make a corresponding request as soon as is practicable.

2.5.1  Notifications
2.5.1.1 The following airspace below FL 195 is notified as Class E Airspace:
  1. Parts of the Scottish Terminal Control Area below 6000 FT (See ENR 6-37);

  2. Parts of the Farnborough Control Area (See Note 1);

  3. Doncaster Sheffield CTA 13 (See Note 1 and Note 2);

  4. Holyhead CTA 15 and CTA 16 (See Note 1);

  5. Argyll CTA (See Note 1);

  6. Moray CTA (See Note1);

Note 1: Additionally notified as Transponder Mandatory Zone airspace for the purposes of the UK Air Navigation Order.

Note 2: Additionally notified as a Transponder Mandatory Zone and a Radio Mandatory Zone.

2.5.1.2  Pilots of VFR flights who wish to operate without receiving an ATS within class E airspace in an aircraft with a serviceable transponder, or within class E airspace additionally notified as TMZ must display either:
  1. The VFR conspicuity code Mode A7000, with altitude reporting; or

  2. The frequency monitoring code defined as VFR conspicuity with altitude reporting established for use in that airspace (see ENR 1.6).

2.6  Class F - Advisory Airspace

IFR

VFR

Service

Air Traffic Advisory Service.

UK Flight Information Services as required (Basic Service, Traffic Service).

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

At and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher:

5 KM flight visibility

Clear of cloud and with the surface in sight.

Alternatively, during day only, at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher, for all aircraft, flying at 140 KT IAS or less (See Note):

1500 M flight visibility

Clear of cloud and with the surface in sight.

Speed Limitation

Below FL 100:

250 KT IAS;

OR

lower when published in procedures or instructed by ATC.

Note: The VMC criteria stated in the table above for flight by day at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher, reflect changes from SERA.5001 Table S5-1, as enabled through the Aviation Safety (Amendment) Regulation 2021.

No UK Airspace is currently designated Class F.

2.7  Class G Airspace

IFR

VFR

Service

UK Flight Information Services as required (Basic Service, Traffic Service, Deconfliction Service or Procedural Service)

Separation

ATC Separation cannot be provided due to the nature of the unknown Class G traffic environment.
Deconfliction advice is provided against participating aircraft under a Procedural Service or against participating and non-participating traffic (unknown traffic) under a Deconfliction Service. Both the Procedural Service and Deconfliction Service aim to achieve planned deconfliction minima.

ATC Rules

Instructions issued by controllers to pilots operating outside controlled airspace are not mandatory; however, the services rely upon pilot compliance with the specified terms and conditions so as to promote a safer operating environment for all airspace users.

VMC Minima

Not applicable.

At and above FL 100:

8 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

Below FL 100:

5 KM flight visibility

1500 M horizontal and 1000 FT vertical distance from cloud.

At and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher:

5 KM flight visibility

Clear of cloud and with the surface in sight.

Alternatively, during day only, at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher, for all aircraft, flying at 140 KT IAS or less (See Note):

1500 M flight visibility

Clear of cloud and with the surface in sight.

Speed Limitation

Below FL 100:

250 KT IAS;

OR

lower when published in procedures or instructed by ATC.

Note: The VMC criteria stated in the table above for flight by day at and below 3000 FT AMSL, or 1000 FT above terrain, whichever is the higher, reflect changes from SERA.5001 Table S5-1, as enabled through the Aviation Safety (Amendment) Regulation 2021.

2.7.1  Designation
2.7.1.1 All UK Airspace, including that above FL 660, not included in Classes A to F.
2.7.2  Aerodrome Traffic Zones and Notification for Rule 11
2.7.2.1 Aerodrome Traffic Zones (ATZs) are not included in the Airspace Classification System. An ATZ assumes the conditions associated with the Class of Airspace in which it is situated.
2.7.2.2 Every aerodrome at which an ATZ is established is notified for the purposes of Rule 11 of the Rules of the Air Regulations 2015. As a minimum therefore, when flying within an ATZ the requirements of Rule 11 must be complied with.
2.7.2.3 ATZs at civil licensed aerodromes are notified in the UK AIP within individual aerodrome entries. ATZs at other than civil licensed aerodromes are notified in the UK AIP at ENR 2-2.
2.7.2.4 Where the requirements of the Class of Airspace of which an ATZ forms a part are more stringent than Rule 11 then those must be complied with. Thus, in Class G Airspace Rule 11 will be the relevant requirement, but in Class A Airspace the more onerous requirements of Class A take precedence.
2.7.2.5 Aerodromes at which ATZs may be established are those which:
  1. Are government aerodromes; or

  2. have an Air Traffic Control Unit; or

  3. have an Aerodrome Flight Information Unit; or

  4. are licensed and have a means of two-way radio communication with aircraft; and whose hours of operation are notified for the purposes of Rule 11.

2.7.2.6 Pilots should be aware that in order to comply with the provisions of Rule 11 they must adopt the following procedures:
  1. Before taking off or landing at an aerodrome within an ATZ or transitting through the associated airspace, obtain the permission of the air traffic control unit, or where there is no air traffic control unit, obtain information from the flight information service unit or air/ground radio station to enable the flight to be conducted with safety.

  2. Radio equipped aircraft must maintain a continuous watch on the appropriate radio frequency and advise the air traffic control unit, flight information unit or air/ground radio station of their position and height on entering the zone and immediately prior to leaving it.

  3. Non-radio aircraft operating within a notified ATZ must comply with any conditions prescribed by the air traffic control unit, flight information unit or air/ground radio station prior to the commencement of the flight with any instructions issued by visual means.

2.7.2.7 Failure to establish two-way radio communications with the air traffic control unit, flight information unit or air/ground radio station during their notified hours of operation must not be taken as an indication that the ATZ is inactive. In that event, except where the aircraft is in a state of emergency or is being operated in accordance with radio failure procedures, pilots should remain clear of the ATZ.
2.7.2.8 Rule 11 does not apply outside the notified hours of operation. Permanent changes or temporary extensions to ATZ hours may be notified by United Kingdom NOTAM. Pilots should exercise caution, however, since some airfields may continue to operate outside of those notified hours.