| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | FM | Meteorological service | | | XX | miscellaneous plain language | | | / | | | 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 |
| | DURING AERODROME CLOSED HOURS ALL OBS WILL BE AUTOMATED AND MAY NOT ACCURATELY REFLECT CURRENT COND,TAF WILL NOT BE PUBLISHED OR UPDATED,AND PILOT TO MET SERVICE VIA LAND MOBILE RADIO MAY NOT BE AVAILABLE.FOR ANY UPDATES TO THE OBS OR FCST AND FOR PILOT TO MET SERVICE ( CONTACT BASE COMMAND POST ) AND ASK TO BE FORWARDED TO THE STANDBY FORECASTER. |
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