What would you guys say was the bestvalued mountain bike you could buy. I have around £600-
Any suggestions

At that price you will be looking at a hardtail and there are loads of bargains around... If you take a look online or in the mags you should be able to find plenty of decent bikes in that price range and if you go with one of the larger maunfacturers such as Specialized, Giant, Trek, Kona, GT etc then you can't really go too far wrong. Just make sure you get the right size.

As far as best value goes then these big manufacturers are all pretty similar... Chris Boardman does a range of mountain bikes that on paper look like really good value for money with really good spec for the price, but I don't know what the frames are like, and I doubt if you'll find them at reduced prices as the range is fairly new.

Al.