Thanks for all your replies.
Well we went to see him tonight and couldn't leave him behind. We are unsure but think he's had a fairly hard year or so. His nails are over grown and so is his beak. His heat lamp wasn't working but came with a spare bulb.
I was told he didn't need water
So it's a trip to the vets tomorrow and stock up on some soil and sand from B&Q and a tortoise box for warm nights outside.