| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | AZ | Aerodrome traffic zone (ATZ) | | | CA | activated | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | N | For immediate attention of aircraft operators | | | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | A | Aerodrome information | | | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 023 | 2300 feet QNE | | | / | | | Centre Latitude | 5135N | 51° 35' North' | | Centre Longitude | 00031W | 0° 31' West | | Radius of area affected | 002 | 2 nautical miles |
| | DENHAM AIR TRAFFIC ZONE ACTIVATED,AIR TRAFFIC SERVICES OPERATING HOURS EXTENDED |
|
