In reply to Simon Holden (LCandCC):
Ryanair flies Liverpool-Carcasonne (75 minute drive to the centre of the Ariège climbing area at Tarascon) and also does so an Saturdays. Apologies if Ryanair means slumming it - it's only for a few hours and you get most of your sanity back at the other end!
Jet2 flies Leeds/Bradford-Toulouse (a similar distance drive away) but I think only from May onwards. Also check Thompson, Flybe, etc. as the dates and routes change frequently and I can't keep up! Lots of standard carriers also fly to Toulouse as well, and Easyjet runs 3 flights every day there from Gatwick (not a lot of use for you I know!)