Another lidl offer I have just come across;
http://www.lidl-photos.co.uk/will do prints, canvas prints photobooks (I haven't tried them yet).
There's an offer in the Lidl magazine for a free photobooklet with any order (I don't think there's a minimum spend to get it).
The code is
freephotoook456 and you have to enter it on your order. Valid to 31st December.
(I don't work for Lidl or any company connected with them).