Help to settle an argument - which first

[Old Mod]

If you are attempting to joint bond all 4 walls and floor, and assuming the wall and floor joints are going to be the same width, then it may be a case of doing 2 walls then the floor then the other 2 walls.
Nowt worse than seeing the joints not match up by a few millimetres!

totally agree John, that's the way I've always done it. Foolproof method for me.

 

[ttt tiling]

Usually do walls first , but then usually think , should really do floor first , foolproof!