You really should check out "The Goon Show", then you would realise where Cleese and Atkinson developed their humour from. In the fifties and early sixties, it was Spike Milligan and Peter Sellars that revolutionised comedy on BBC radio.
They also influenced the "Fire Sign Theatre" in San Fransisco!
Indeed, Monty Python and Blackadder are also known to me, and I always enjoyed them too.
I always go back and watch some old snippets.
Life of Brian: "A w(r)oman hey?"... "I have a friend who's name is: Biggus Dickus" LOL... that whole scene cracks me up!
Forgot to add it:
Blackadder: "Percy, what have you got in your hand?"
Percy: "Nothin at all, Blackadder"
Blackadder: "Come on!!! What is it?"
Percy: "Oh well, it's a potato. Blackadder!"
Blackadder(sigh): "Another new fad, brought to us by Sir Walter bloody Raleigh. Everywhere you go in London these days, its 'potato this, and potato that', the next thing you know, they'll want us to eat the bloody things!"
I've got the whole lot on DVD.