I had a further little thought about that Flash contraption that would like to sell you sound clips for £1·50. Notably, be you alive, dead or zombie, mechanical copyright in the UK is still only 50 years, which means that most of the Goon Show (1951-1960) is now out of copyright. Oops.
Except, not being a lawyer but sometimes being a reasonably good pedant with a twisted defensive mind, I've no idea whether:
and whether there would still be other royalties owing for the authorship rights on the scripts (and similarly for the rights due to the songwriters of the music)