benjavert answered your post: Bleak Expectations! It has finished but there are 6 seasons of excellent witty british radio comedy!
sertetlen answered your post:This passing stranger seconds Bleak Expectations - it doesn't have consistent brilliance of Cabin Pressure, but it is exceptionally silly Dickensian-inspired fun. It starts out as a pretty straight-forward parody and then goes gloriously off-piste.
Several people have mentioned this, so it's certainly on the list - thank you! :-)
akettleandaballofstring answered your post: hitchhiker's guide to the galaxy
not-the-stig answered your post: I add my vote for HHGG (I think there's more than one version tho, not sure which one I've heard)
Oh yes, I loved the book and film, why didn't I think of this?! Thanks!
weaseltube answered your post: The Springheel Saga
Oh, I've not heard of that - I'll look it up. :-) Thank you!
golf-echo-romeo-tardis-umqra answered your post: Wow! Hey, and I follow you! Old Harry's Game, sitcom, (You will love Satan). That Mitchell and Webb Sound, sketch. Into John Finnemore's voice? Check out his Now Show sketches or Unbelievable Truth episodes. The first two are harder to find.
If I wasn't already definitely giving Old Harry's Game one a go (I'm downloading the first series on iTunes as I type), the words "you will love Satan" would have sold it for me! Thank you for all the other recommendations too, this list is looking pretty good now...