Hello, good evening and welcome, ritchie (I see you've just joined). I'm so sorry to learn of Michael's ill health and know myself what it's like to be housebound with restricted movement. I wish you very good luck with your blog as I too am keen on raising the profile of forgotten and unappreciated actors. I'm mostly familiar with Michael's guest appearances in various ITC shows, including Randall and Hopkirk (Deceased).
This is him as Larry Wentworth in the episode
For the Girl Who Has Everything (1969):
R.I.P.,
Michael Coles