How about
From Northolt; BEA's, white topped Pionair class Dakotas and Admiral Class Vikings plus the Aer Lingus Bristol Freighters
From Stansted; Air Charter's Avro Supertraders and Skyways light blue and maroon Hermes and Yorks
From Southend; any airline that operated through SEN in the 1950's and 60's - Air Charter/Channel Air Bridge/British Air Ferries, Channel Airways, Tradair, Overseas Aviation, Continental, BKS, Fred Olsen, Transair Sweden, Delta Air Transport Martins Air Charter, LTU, the list is almost infinite.
Those were the days