Scheduled airlines then were mainly those services of BEA (Domestic and European) and BOAC (Worldwide) flying from London Airport (LHR).
You also had from 1964, the two main UK Independant Airlines British Eagle International Airways, and British United Airways who were operating both many Scheduled and Charter flights.
BUA had just received new VC10's and were flying from Gatwick Airport to West, Central and East Africa, plus down to South America.
They also from 1965, had a fleet of new BAC 1-11 jets.
British Eagle were desperately trying to regain licences from the BoT to again operate with newly ordered 707C's, flights from London Airport to Bermuda, Nassau Miami and Kingston.
Sadly they would go under in late 1968.
The rest of UK's air traffic was made up of the many small Independent and Charter airlines.