In reply to squirrel00:
Hi
(I know I always pop up on these kind of threads shouting 'Islabikes!', but...)
As Sam W says, around the £300 mark I'd try to steer clear of suspension entirely (heavy and unlikely to work well at this price point). Also worth looking at the overall weight of the bike. Kids bikes can be staggeringly heavy, for example the Boardman Sport/E has a quoted weight of 13.30Kg - that'd be heavy-ish for an adult, not much fun for a 10 yr old. If you could nudge your budget to £350 then you'd be in the zone for an Islabikes Beinn 26 small (assuming the size is right) which weighs 9.46Kg - almost 4Kg lighter than the Boardman. Also, you'd probably get about 80% of the price back if/when you sell it, makes the overall cost of ownership very low.
Hope this helps
Dave