"Why don't you become a clippy?" Clippy was a slang term for a bus conductor and came from the ticket clipping machine they carried.
On The Buses was a London Weekend Television sitcom, created by Ronald Chesney and Ronald Wolfe, that aired from 28 February 1969 to 20 May 1973 in the UK. Pictured are:
Reg Varney (1916-2008) as Stan Butler. Reg had also starred in The Rag Trade, broadcast 1961-1963, which had also been created by Chesney and Wolfe.
Stephen Lewis (1926-2015) as Inspector Cyril Blake or "Blakey". He came up with the show's catchphrase "I 'ate you Butler" himself and, when touring as an actor, was known to visit local bus depots in character as Blakey and shout at staff.
Bob Grant (14 April 1932 - 8 November 2003) as Jack Harper.
Anna Karen (1936-2022) as Olive Rudge (Stan's sister).
The other main cast were Michael Robbins as Arthur Rudge and Cicely Courtneidge and Doris Hare who both played Stan's mum, Mabel.
Three movies were made - On The Buses, Mutiny on the Buses and Holiday on the Buses.
For the true anoraks out there the bus shown above is a Bristol Lodekka (the name coming from it having a lower overall height than the standard double-decker bus).