| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OB | Obstacle | | | CH | changed | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | A | Aerodrome information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 999 | Unlimited | | | / | | | Centre Latitude | 5408N | 54° 8' North' | | Centre Longitude | 00316W | 3° 16' West | | Radius of area affected | 005 | 5 nautical miles |
| | WALNEY OBSTACLE ( EGNL4100 ) LIGHTING UPDATED TO READ : YES,RED.UK AERONAUTICAL INFORMATION PUBLICATION EGNL AERODROME 2.10 REFERS. |
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