| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | MR | Runway | | | 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 | 5222N | 52° 22' North' | | Centre Longitude | 00029E | 0° 29' East | | Radius of area affected | 005 | 5 nautical miles |
| | CAUTION : MEN AND EQUIPMENT CONDUCTING SURVEYS ALONG THE NORTH AND SOUTH EDGE OF RUNWAY 10 / 28.MAXIMUM EQPT HEIGHT : 10 FT ABOVE GROUND LEVEL / 47FT ABOVE MEAN SEA LEVEL.ALL CAN VACATE WITH 5 MIN PRIOR NOTICE TO AIR TRAFFIC CONTROL.MON TO FRI,0900 TO 1500. |
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