| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | CA | Air/ground | | | AS | unserviceable | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | B | For inclusion in Preflight Infomation Bulletins | | | O | Operationally significant for IFR flights | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 195 | 19500 feet QNE | | | / | | | Centre Latitude | 5421N | 54° 21' North' | | Centre Longitude | 00021W | 0° 21' West | | Radius of area affected | 193 | 193 nautical miles |
| | LONDON FIS FREQUENCY 125.475MHZ ( AREA I ) NOT AVAILABLE DUE MAINTENANCE.PILOTS ARE ADVISED OF POSS COM DIFFICULTIES AND SHOULD CONSIDER AN ALTN SERVICE IF REQUIRED |
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