| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | GW | GNSS Area-wide operations | | | XX | miscellaneous plain language | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | W | Navigational Warning | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5148N | 51° 48' North' | | Centre Longitude | 00412W | 4° 12' West | | Radius of area affected | 110 | 110 nautical miles |
| | GNSS ( GPS ) SIGNAL JAMMING / SPOOFNIG WITHIN AREA BOUNDED BY 531933N 0041511W-524557N 0014249W-502148N 0030954W-504718N 0063454W-531933N 0041511W ( SENNYBRIDGE ). THIS REPRESENTS THE MAXIMUM JAMMING EXTENT,REFER TO BRIEFING SHEET 091 / 2026 FOR FULL DETAILS.ACTIVITY MAY AFFECT AIRCRAFT SURFACE TO 40000FT ABOVE MEAN SEA LEVEL OR ABOVE ( ALL DIRECTIONS ). GNSS ( GPS ) RECEIVERS MAY SUFFER INTERMITTENT / TOTAL FAILURE OR GIVE INCORRECT POSITION INFO.MAY ALSO AFFECT AIRBORNE ELECTRONIC SITUATIONAL AWARENESS DEVICES AND UAS CONTROL.FOR INFO / CEASE JAMMING 01874 635599 / 01980 955882.AR-2026-4831 / 03. |
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