I was just searching for some information on Radio 1 jingles on Google, and I came across this link to a Radio 1 & 2 page on JAM's website:-
http://www.jingles.com/jam/collector/bbc.html
Interestingly, as far as I'm aware, the actual page isn't linked to from JAM's main site. The page was produced by JAM in 2007 in recognition of the 40th anniversary of Radio 1 and Radio 2.
Apologies if this page has been previously publicised on JingleMad, but a quick search in the forums didn’t produce anything.
There are several bits of interesting audio and video highlights from JAM's archives to sample, including a video of the vocal session for the 1984 Radio 1 jingle package.
The page is well worth taking a look.