| Significance | Code | Meaning |
|---|
| FIR | EGXX | UK Open FIR | | | / | | | Qualifiers | Q | | | | OA | Aeronautical information 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 | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5504N | 55° 4' North' | | Centre Longitude | 00500W | 5° 0' West | | Radius of area affected | 999 | 999 nautical miles |
| | THE UK AFS,AFTN AND AERONAUTICAL MESSAGE HANDLING SYSTEM NETWORK WILL BE INTERRUPTED FOR 30 MIN DURING THIS PERIOD,DUE TO MAINTENANCE.THE OUTAGE WILL AFFECT ALL INTL AND NATIONAL CONNECTIONS TO THE UK MESSAGE SWITCH WHERE NO AFS DATA WILL BE EXCHANGED HOWEVER,MESSAGES WILL QUEUE FOR DELIVERY ONCE THE OUTAGE IS COMPLETE.AFTN NOTIFICATION MESSAGES WILL BE SENT TO ADVISE 1 HOURS BEFORE START OF OUTAGE,AND AGAIN WHEN THE SVC IS RESUMED |
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