Guessing? Mmm. Sid owned the cafe. There was a Sid at the Co-op in 'First of The Summer Wine' and somebody had a cat called Sid. Somehow I think I'm wrong but it is a guess.
Could it be Ivy?. She runs the Cafe. I think she worked at the Co-op in First of The Summer Wine though I can't think of the connection with a cat.
Margaret Stallard? Her character and her husband were in the cafe in 'Who's Looking After The Cafe Then' and also in the White Horse in 'Set The People Free' Not sure about the co-op and the cat.