I see that F&T have Karrimor winter trousers for £15, might be worth a punt. Now is the time to be looking out for your gear for next winter, if you want a deal.
http://www.fieldandtrek.com/SearchResults?DescriptionFilter=karrimor winter trousers (http://www.fieldandtrek.com/SearchResults?DescriptionFilter=karrimor%20winter%20trousers)
I used a pair of TNF winter lined trousers this winter and have loved them. Previously I tended to sit around with five top layers on and cold legs.