Eric Sykes' obituary on the BBC website:
http://www.bbc.co.uk/news/entertainment-arts-18703602
From that:
He offered simple, innocent humour devoid of malice, writing for such big stars of the day as Peter Sellers and Professor Stanley Unwin.
But he also wrote for the surreal, cult comedy The Goon Show.
He was brought on board in 1954, partly to help ease the workload of the show's co-creator, Spike Milligan.
For a time they worked together in a single office. When the show left the airwaves in 1960, they continued their partnership on its TV spin-offs.
Even after Milligan's death in 2002, Sykes demanded that his receptionist answered the office phone by saying: "Spike Milligan and Eric Sykes' office."
"I know he's dead but we shared offices together for 50 years," Sykes told Metro earlier this year.
"He passed on ahead of me. He was going to do it before me, to see what it was like, for my benefit.