Hi thought I would share this experience hopefully save someone else the inconvenience. Bought slate tiles off an Ebay trader month before xmas, didn't check the delivery, came to fit them over xmas found 2 boxes short, the retailer would not sort, left me over a meter of tiles short for the job. 3bay tiles not recommended. I have used several other tile traders that have been brilliant on there, choose carefully read the negative feedback responses. Hope this saves someone a head ache and a few hundred quid.