| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | MX | Taxiway(s) | | | HW | work in progress | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | 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 |
| | TAXIWAY A WORK IN PROGRESS ON SHOULDER AT HOLDING POINT A4 BTN 1.5M AND 26M E OF CL.CODE A AIRCRAFT AND HELI DEVIATE W OF CL AND MANOEUVRE WITH CAUTION.CODE B AND CODE C AIRCRAFT EXPECT FOLLOW-ME. |
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