I found a photo of Frederick Treves in the Liver Birds, unfortunately he has his back to the camera!!
I did see that Hollinhare, and thought the same as you - very Follyfootish. It wasn't what I was thinking of though, it was before that. I watch so many of the old programmes that I just can't remember!
I spend as much of the day as possible in the 70's Loopy - skipping from Liver Birds to George & Mildred or Man about the House!! So much so that Munchkin 2 was singing the tune from the Liver Birds on the way to school this morning... I don't suppose there are many other 8 year old boys in 2014 who could manage that, I think we've cornered the market!!