It's done 90,000, I took it to my local mechanic who was 90% sure it is the piston rings, said it's unlikely that it'd be the valve seals. I'm also having to clean out the throttle body more and more often aswell not to sure if that's a related problem or not..
I've also just found out the previous owner has had fully synthetic oil running in it which in quite worrying...
ps. thank's for replying and I apologise for not responding quicker but i've been on a team building course for the past month