In message , TrailRat wrote
What the sample boards don't show is the 'quality' of the tiles. For example, are the tiles glazed on the edges? The sample boards are usually suspended above top shelf so that you cannot see from 30 feet away the surface finish.
With tiles the corners or edges of the tiles are often smashed because they have been mishandled at some time. It is reasonable for customers to check for damage BEFORE purchase.
There is also the problem in B&Q that items returned are put back on the shelves unchecked even though the original purchaser has removed the small part he wanted before getting his refund.