Three-letter codes.

[G-CPTN]

Military aircraft during WWII were allocated three-letter alpha codes that were painted on the sides in large letters.

Anybody have an insight into the structure of these letter-codes?

[CharlieOneSix]

This might help:

The RAF used three-letter codes to identify aircraft from a distance.
Two letters before the roundel, for the squadron to which the aircraft belonged,
and another letter after the roundel for the individual aircraft.

http://p.v.free.fr/l_for_love/raf_codes.htm

[G-CPTN]

Many thanks.