Check out a Decathlon store if there is one near you, they're slowly moving over here from France (I used to shop there before they came here!) but their camping gear is so unbelievably cheap but at the same time its really good. I have their 3 season sleeping bag and it squashes down really really small.
http://www.decathlon.co.uk/EN/Product_arborescence/mountain/hiking/hiking-sleeping/camp-sb/product_6548797/index.html is the one I have I think... I know its cheap but I am seriously impressed with it. Unless you're going to be camping in freezing conditions and you have a camping mat then you'll be fine in this.
Decathlon also have tons of general purpose stuff in their own brand, camel backs etc Great stuff!
(I'll stop the Decathlon lovin' now
)
