thinking about getting a pair of sealskinz for my impending trip down the wye, anyone know if a) they are worthwhile and b) a decent online supplier or a store in the liverpool area which sells them?

cheers! 

They do take forever to dry, but they are waterproof (at first anyway), just not very breathable. I wear them in fell shoes and on the bike and I like them a lot. I have both weights of the merino lined ones, for hill routes or long days not running a light liner sock improves comfort quite a bit for me.

Another option is TrekMates GoreTex oversocks. Like the Sealskinz they feel a bit weird at firts but are actually pretty good.

I bought a pair each for the kids - they like fabric boots. both seem to like them and they work OK.

 They wear them with sock 'liners' because they do feel a bit wierd but they've survived a year of scouting and they wouldn't be without them.

If they do get wet on the inside, just turn them inside out to dry. After all it doesn't matter if the outside stays wet, does it?