The show won the Bafta for Best Drama Series in 1998.
It has previously starred Sheridan Smith, Caroline Quentin and Julia Sawalha.
“I sent a text, and Ade [Edmonson, Saunders’s husband] replied saying that she had cancer but was coming through it.
Seeing her this year, you wouldn’t have known she’d been ill.
His other TV roles include Many a Splintered Thing and Bob and Rose.