| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | WE | Exercises | | | LW | will take place | | | / | | | 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 | | | W | Navigational Warning | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 023 | 2300 feet QNE | | | / | | | Centre Latitude | 5323N | 53° 23' North' | | Centre Longitude | 00301W | 3° 1' West | | Radius of area affected | 003 | 3 nautical miles |
| | MULTIPLE HEL OPERATING WITHOUT LIGHT WITHIN 2NM RADIUS : 532320N 0030033W ( BIRKENHEAD ). FOR INFO 01912 395390 EXT 2369.AR-2024-7863 / AU3. |
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