Peter Masson wrote:

IIRC before the Fares Fair era, London Transport buses worked on the basis
that you paid your cash fare for each separate journey, with few exceptions.
I don't think there were such things as bus season tickets, return tickets
on London buses, or through (or interchangeable) bus/tube or bus/rail
tickets. The only exceptions I can remember were schoolchildren's free
passes, Red Rovers, Green Rovers (freedom of Central or Country buses for a
day) and Twin Rovers (red buses plus tubes).

There were also period rover tickets, I can't remember if they were
still called 'Red Rovers', but I do remember the cards on the buses
advertising them; they were £6 per month and £60 per year. I think
that was in about the late '60s.