| Significance | Code | Meaning |
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| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | FF | Fire fighting and rescue | | | CG | downgraded | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | N | For immediate attention of aircraft operators | | | 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 | 5141N | 51° 41' North' | | Centre Longitude | 00147W | 1° 47' West | | Radius of area affected | 005 | 5 nautical miles |
| | FIRE FIGHTING AND RESCUE CAPABILITY HAS BEEN DOWNGRADED TO CRITICAL LEVEL ( CLS ) OF SERVICE FOR C-5,B-747,MD-1.FIRE FIGHTING AND RESCUE CAPABILITY HAS BEEN DOWNGRADED TO REDUCED LEVEL OF SERVICE ( RLS ) FOR C-17,B-1,B-52,KC-135 RC-135.CLS REPRESENTS LIMITED RESCUE CAPABILITY AND INCREASED RISK / LOSS POTENTIAL DUE TO LIMITED RESOURCES.CLS IS CONSIDERED A ONE SHOT CAPABILITY THAT CANNOT BE SUSTAINED MORE THAN APPROXIMATELY 15 MINUTES.RLS REPRESENTS INCREASED RISK / LOSS POTENTIAL DUE TO LACK OF EMERGENCY RESPONSE CAPABILITY TO PERFORM RESCUE AND SUFFICENT MITIGATION TACTICS SIMULTANEOUSLY.OBJECTIVES MAY NOT BE SUCCESSFUL DURING SITUATIONS WHERE SIMULTANEOUS RESCUE ANDFIREFIGHTING ACTIVITIES ARE REQUIRED. |
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