Urban permaculturist, Roberto Perez, spoke in Sheffield on 25th September 2008 at a meeting organised by Sheffield Cuba Solidarity Campaign and Grow Sheffield, http://www.growsheffield.com/
The recording includes the soundtrack from a short version of The Power of Community: How Cuba Survived Peak Oil, http://www.powerofcommunity.org/cm/index.php
Recorded by Chris, post recording audio production by ZKT, http://zkt.blackfish.org.uk/
Photos from the event, including some of the slides: http://www.indymedia.org.uk/en/regions/sheffield/2008/10/410592.html
Earlier in his tour Roberto Perez visited Totnes and this talk was also recorded, see the write up on the Transition Culture blog, http://transitionculture.org/2008/10/06/roberto-perezs-visit-to-totnes/