Does anyone know (if they exist or not!) any places/companies that copy photos into posters?

And if so how much roughly it costs.

I think Boots do it?????
But I have no idea how much they cost.

I can recommend this company in North Wales  :-
http://fairway-design.co.uk   01352 792020  e-mail info@fairway-design.co.uk
Not sure what they'd charge for a poster but the job I've just had done was very reasonable.

Next do it up to a (framed) size of 60 x 60cm or alternatively print it onto a canvas.

go to www.next.co.uk then go to the home section than accessories.  Can't remember how much it is though!

£39.99 - £79.99 for canvasses

£54.99 - £94.99 for framed art.

But i'm guessing that you can get it for cheaper than that in other places!