By 1976 it was clear that Michael Bates was ill. The cancer which was to eventually kill him meant the strenuous walking through the hills became impossible. He was written out of the series and his noticeable gap was filled by Brian Wilde, who had already become known as Mr. Barrowclough in Porridge (1974). Michael Bates did continue to appear in his other success, It Ain't Half Hot Mum (1974), but died soon after.
In May 2009, Peter Sallis (Clegg) revealed that the programme was nearly cancelled before it had even started, when Bill Owen (Compo) who was very left-wing and Michael Bates who was very right-wing started having a heated and vigorous argument about their different political affiliations, over dinner when they first met. Producer James Gilbert read them the riot act and told them that unless they agreed to differ, and not to argue about politics, he was going to cancel the project. Owen and Bates meekly agreed and never discussed politics again.
The long-running series generated such a devout worldwide following, a special tour operation evolved over the years affording fans and visitors the opportunity to explore the actual series locations and enjoy the picturesque surroundings.
Holmfirth was chosen as the setting for Last of the Summer Wine after Barry Took made a programme about Working Men's Clubs at nearby Burnlee WMC. When producer James Gilbert was looking for a location for an episode of Comedy Playhouse (1961), Barry Took recommended Holmfirth. That episode was developed into the series "Last of the Summer Wine".
The series has been officially declared the world's longest-running television sitcom, airing continuously between Wednesday 4th January 1973 to Sunday 29th August 2010. Peter Sallis was the sole cast member to appear (as Norman Clegg) throughout the whole 31 seasons. He also appeared (as Clegg's father) in the spin-off prequel series First of the Summer Wine (1988).