Theme tune?

Here's a question for the UK readers - can anyone remember the TV series 'Ever Decreasing Circles' with Richard Briars and Penelope Wilton ? What was the piece of piano music that went with the credits? Shostokovich? It was first shown in the 80's I think, and was a great comic statement on life in the suburbs.

I think it's called '??? Waltz' by Gershwin, and in its original form, is a short piano piece. It is in some collections of piano pieces by

The music is by Shostakovich. It's No. 15 of the 24 Preludes, Op. 34. It lasts for less than a minute, at least on the recording I have, so was ideal for the purpose.

Ever Decreasing Circles was the thinking person's suburban sitcom. It's difficult to imagine anyone asking about the theme music for Terry and June in here.

Could anyone tell me the theme music for the BBC 'Terry and June' sitcom?

Thanks