| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | FT | Transmissometer | | | AS | unserviceable | | | / | | | Traffic | I | IFR 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 | 5120N | 51° 20' North' | | Centre Longitude | 00002E | 0° 2' East | | Radius of area affected | 005 | 5 nautical miles |
| | RUNWAY 21 / 03 INSTRUMENT RVR UNSERVICEABLE UK AERONAUTICAL INFORMATION PUBLICATION GEN 3.5,AERODROME 2.EGKB-2-1 REFERS. |
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