found it !!!

http://www.bbc.tv/radio/aod/networks/radio2/aod.shtml?radio2/r2_sameoldsong

"It's the Same Old Song (30 min)
Broadcast on Radio 2 - Tue 28 Mar - 21:30

Marc Riley presents a series charting the history of plagiarism, pastiche and plundering in popular music."