Yes Heathcote Williams, performed by Pip Utton. Seen Pip in lots of one man stuff - Churchill, Hitler and even Thatcher. He is superb.
It was Hancock who of course ditched Sid James. He thought they were becoming a 'double act'. Of course it didn't harm Sid's career much.
Harry H Corbett was of course a classically trained actor, and always thought Steptoe & Son was a bit beneath him. Not sure how he squared that with 'Carry On Screaming'! Wilfred Bramble was a terrible alcoholic.
How these gems ever got made, I'm not sure!
We've had some brilliant writers, Clement and La Frenais, Croft and Perry, John Sullivan etc, but I think Galton and Simpson come out tops.