He also appeared in Brideshead Revisited, Pennies From Heaven, The Saint, The Avengers, The Prisoner, Quatermass II, The Champions, the doorman at a hotel in Terry and June, in the Doctor Who stories, The Massacre of St Bartholomew's Eve, Pyramids of Mars and The Deadly Assassin, Wodehouse Playhouse, (as Malay, the Butler), Dad's Army (as Mr Maxwell, the solicitor), "The Adventure of Shoscombe Olde Place" episode of The Case-Book of Sherlock Holmes; (also notable in the cast was Jude Law as an aspiring jockey).
Bilton's film appearances included A Taste of Honey (1961), The Thirty Nine Steps (1978) and The Fourth Protocol (1987), as Kim Philby.
The male half of the couple was played by David Hargreaves, who also appeared in the BBC drama series Juliet Bravo.
His last London West End appearance, in the early 1980s, was alongside Penelope Keith in Hobson's Choice at the Theatre Royal, Haymarket.
The character of Basil was essentially "replaced" by Jamie Edwards, Jane's spirited Irish grandfather, who was played by Paddy Ward.