M
m3fitter
I think you've set it out wrong ( ie it's not the way I would have done it).
I'd have put the full tile in the middle of the flush plate with a large cut to right and left, this would have meant a full piece of tile up both sides of the window ( as opposed to 2 unequal cuts).
My other point of note is you've used the boxing height as the horizontal datum line which has meant a cut to the floor which IMHO is too small!
I think the customer has a valid point and it's now a case of opinions.
not opinion, its incorrect, sorry to say, I will always back another tiler, unless its blatant.... sorry to say there are fundamental setting out faults here, not sure with 30 years experience it has been set out this way ?