Found a great web site the other day. Was looking around the web trying to find the cheapest site to print a load of photos and came across the above. As you can see by registering with different sites they offer you free prints, no need to return and order more so make your way through the list and get stuff for free, 877 free prints at present!
When you’ve used up your allocated free prints, get your partner, friends and family to then register as it’s per customer. I’ve started using them and it works well so far!
Update – Have printed 156 photos so far and paid only £4 towards postage, use Truprint, Photobox & Asda. Truprint and Photobox the best, Asda a bit awkward.