interesting thread. i use Topps tiles amongst other outlets - never diy sheds though. I have always had good service, but i do tell my customers what to stay away from though. When collecting or checking delivery of tiles, i always check every box for batch, tone and calibration where applicable and reject any not matching, also reject any boxes that have been tapped back up. I used birkenhead, anfield and chester branches and have not had any problems with staff regarding changing or returning mix batch tiles. i have even opened boxes in store in front of managers and rejected stuff. Just another thought, some tile manufacturers recommend opening boxes to check for shade variations prior to fixing. Does this go some way to absolving the of blame when things like the above happen?