By Plane
There are direct flights to Toulouse, Bordeaux, Bergerac or Carcassonne from Belfast, Bristol, Birmingham, Dublin, Edinburgh, Glasgow, Manchester London Gatwick and Southampton
By Train
Using the Eurostar from Waterloo to Paris and connecting to Gare Montparnasse it takes 4 hours on the TGV to Agen (25km away from Roujol). There are hire car locations at the station in Agen.
By Car
Which port you enter France by will be somewhat dictated by where you live within the UK. Once in France www.viamichelin.com will work out detailed routes for you, cost the toll and even the fuel! The journey from Calais takes about 7 1/2 hours mostly down the autoroute to Cahors and then main / local roads for about 45 minutes.