I'm looking for a lightweight bivvy bag (Alpkit Hunka, or something more impressive). I'm hoping to spend £30-£40. It's probably only going to be for three fairly dry climbing/hiking trips (hence needs to be lightweight). I reckon I'll stick with the tent if it's set to hammer it down.
I know that the Alpkit bag isn't super expensive new, but I prefer to buy second hand if possible. There was a great article on UKC recently which drew attention to the problems of endlessly buying new kit.