| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | XX | Miscellaneous | | | 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 | W | Navigational Warning | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 014 | 1400 feet QNE | | | / | | | Centre Latitude | 5202N | 52° 2' North' | | Centre Longitude | 00005W | 0° 5' West | | Radius of area affected | 003 | 3 nautical miles |
| | MULTIPLE HEL OPERATING WITHOUT LIGHT WITHIN AREA BOUNDED BY STRAIGHT LINES JOINING : 520300N 0000859W-520348N 0000147W-520034N 0000148W-520033N 0000657W-520300N 0000859W ( THERFIELD ). FOR INFO 01449 728240.AR-2025-2296 / 02. |
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