He has written extensively for stage, screen, TV and radio, including the epic World War II play, Crete and Sergeant Pepper at the Royal Court.
After attending Bishop Wordsworth's School in Salisbury, Wiltshire, Selhurst Grammar School, Croydon, and King Edward VII Nautical College, London, where he was an apprentice deck officer in the Merchant Navy from 1950 to 1952,[4] Antrobus attended the Royal Military Academy Sandhurst, serving with the East Surrey Regiment from 1952 to 1955,[5] but rebelled and dropped out of the Army.
[2][6][7] After leaving the Army, spending time also working as a supply teacher and waiter,[5] Antrobus pursued a future writing comedy, and went to Associated London Scripts (ALS), the writers' co-operative set up by Spike Milligan and Eric Sykes.
[8] He was also a contributing writer to the television series The Army Game, in the 1958 and 1961 shows, along with Larry Stephens, Maurice Wiltshire, and Lew Schwarz in 1958, and Brad Ashton, Barry Took, Marty Feldman and Wilshire in 1961.
In October 2005, Antrobus and Ray Galton (with whom he had collaborated on the 1986 sitcom Room at the Bottom and Get Well Soon from 1997) unveiled their play Steptoe and Son – Murder at Oil Drum Lane at the Theatre Royal, York.