Just asked my wife if she remembered Harry Worth. Her response was "yes he used to do that thing" while flapping her arm up and down. Seems he left quite a lasting impression. I asked her if she remembered anything else about him apart from that, she said "no". Seems like his whole career has...
I used to quite like that thing he did with his arms and legs in the reflection of the shop window in the opening credits, but then I was very young at the time and easily impressed. Can't remember anything about him other than that.