Originally Posted by
sierracharlie
I don't see why not. If they use 'themed' callsigns for the formation courses at North Weald on a daily basis I don't see how these can have been pre-registered with ICAO etc.
I don't know if there's a difference between individual callsigns and formation callsigns. I'm talking about the latter. e.g. 'Badger Formation', comprising G-AAAA, G-BBBB, G-CCCC etc.