Thanks to all those who have replied with flight number/registration info. Also, now it's been mentioned, G-ASZC did call himself "Raffles Zulu Charlie", not sure when he switched to "Raffles One". Mr Raffles had an address in Manchester - did he fly south to get to work in London or was it definitely the other way as has been suggested?
Well off the beaten track now but another rather long shot request. Back in June 1968 the Ethiopian AF dropped into Luton with a C-54 serialled "727". I don't suppose anyone can help with their callsign? Picture (not one of mine) on the Luton History and Nostalgia thread.