The window reveal was not the straightest I have come across, I reckon it probably ran out about 2 inches from top to bottom, so I talked the customer out of it, plus I had never done the three way mitre of tile trim before, but did it on the external corner near the toilet, don't know if it is visible in the pictures.
At the point of taking the pictures the floor had not been grouted and none of the sealing had been done as I was waiting for the plumber to return before doing it, so it is basically all just after grouting.
Thanks for your reply.