| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | FA | Aerodrome | | | HW | work in progress | | | / | | | 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 | 5150N | 51° 50' North' | | Centre Longitude | 00119W | 1° 19' West | | Radius of area affected | 005 | 5 nautical miles |
| | WORK IN PROGRESS ADJACENT TO EASTERN BOUNDARY.HELICOPTER PILOTS ARRIVING FROM THE EAST ARE NOT TO OVERFLY THE WORKS SITE,PERSONNEL OR EQUIPMENT. |
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