| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | SF | Aerodrome flight information service (AFIS) | | | LT | limitation | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | A | Aerodrome information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5139N | 51° 39' North' | | Centre Longitude | 00020W | 0° 20' West | | Radius of area affected | 005 | 5 nautical miles |
| | AFIS DOWNGRADED TO A / G COM SERVICE FOR SHORT PERIODS DUE STAFF AVAILABILITY |
|
