| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | SE | Flight information service (FIS) | | | AU | not available | | | / | | | 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 | 5047N | 50° 47' North' | | Centre Longitude | 00435W | 4° 35' West | | Radius of area affected | 180 | 180 nautical miles |
| | THE FIS WEST PROVIDED BY LONDON AREA CONTROL CENTRE ON FREQUENCY 124.750 MHZ NOT AVAILABLE DUE MAINTENANCE.PILOTS ADVISED OF POSSIBLE COMMUNICATION DIFFICULTIES FOR AIRCRAFT TRYING TO CONTACT FIS W AND SHOULD CONSIDER AN ALTERNATE SERVICE IF REQUIRED DURING THIS PERIOD |
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