| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OL | Obstacle lights | | | AS | unserviceable | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | A | Aerodrome information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5150N | 51° 50' North' | | Centre Longitude | 00119W | 1° 19' West | | Radius of area affected | 005 | 5 nautical miles |
| | OBSTRUCTION LIGHT ON TRANSMITTER / RECEIVER MAST UNSERVICEABLE. |
|
