A question from across the pond: is a All Party Parliamentary Group similar to a US House or Senate committee or is it equivalent to the peak oil caucus Roscoe Bartlett formed?

I think the nearest to a house or senate committee is called a select committee in the UK:

http://www.publications.parliament.uk/pa/ld/ldselect.htm

They often have expert testimony, and people who want to find the facts rather than political games

I think it's the approximate equivalent of Roscoe Bartlett's peak oil caucus.