An Identification Beacon flashing a two letter identification code in green would normally be provided at an aerodrome where a number of aerodromes in the same vicinity operate at night and confusion could arise as to identity. Government aerodromes are normally equipped with a red identification beacon. (CAA)
CAP 637 Chapter 5 para 5.2
| Aerodrome type | Identification beacon colour |
|---|---|
| Civil | Green |
| Government (Military) | Red |