It's not an interview with Underworld, but I caught this on the Richard Bacon / Zoe Ball podcast this weekend:
"...There's an interview with Mike Dolbear, the guy that taught 1,000 drummers to provide the heartbeat of the London 2012 Opening Ceremony, with an exclusive performance from his Pandemonium Drummers..."
The interview is split through the podcast - first part of the interview starts about 6:20, and continues at 31.40. Lots of name dropping of Rick Smith, and the Pandemonium Drummers play a live session (although it is edited for the podcast) and they talk about the process of training 1000 live drummers.
http://www.bbc.co.uk/podcasts/series/dailybacon
Direct Link:
http://downloads.bbc.co.uk/podcasts/...0810-0916b.mp3