Thanks Warmtoast for this interesting link [Flatus Veteranus]to the old flying boat era.
I have a copy of "Corsairville" by Graham Coster-although not yet had a proper read of it...
I understand the early Lancastrian flights were from Hurn [1945-6?] before LHR became fully operational.What with the flying boat services from Poole, this part of the south coast must have been a spotters paradise, although these long haul flights must have all but ceased by say 1950?