Thanks for the advice
He has an appointment at the vets for half 2 tomorrow, so hopefully they can shed some light on what may be wrong with him. He was given the worming treatment and flea treatment in front of me when I got him, and my mum lokked at his bottom and said he looked like he was ok too, apparently they're quite obvious or something :S I do think he may have a tummy upset tho as even though itts no nearly as bad as when I first got him he's still got quite loose stools.
His vacs apparently will cost £77 and neutering is £30, so im prepared dont worry ha ha
Thank you for all your advice!