might be out of your way, but john norris in penrith have usually got mountains of mill end lines for a couple of quid
good place to stock up on cheap flies as well, they do bags of 25 wets/drys or nymphs for around 3.50 ( wellt hey di when I was in last year)
the down side of john norris is that they stock so many other goodies its hard to resist. was in the there last year for some mill ends (wouldn\'t recommend anything esle for saltwater fly fishing) and ended up spending a fortune on more stuff that I don\'t need
http://www.johnnorris.co.uk/