I noticed the other day that our Seymour is in the show "Charters and Caldicott" along with Uncle Mort from "I Didn't Know You Cared" on the YouTube "Classic British Telly" channel. Not watched it yet but plan to soon.
side note:
The channel also recently posted "Let There be Love" with Paul Eddington that I'd like to see as well. Enjoyed him in "The Good Life" and "Yes, Minister/ Yes, Prime Minister" series. I can see Paul, Michael and Mort as a trio not unlike our trio from LotSW.