tiling advise for BS538 and large tiles

[Happyvalley123]

Hi all,

I am looking for some advise on the following:

the adhesive % covering required for 1200 by 600 ceramic tiles in a bathroom on wall and floor. Walls are different sub materials, plaster, jackobaord and ditra matting on the floor.

are chips left in tiles classed as reasonable snagging?

Advise on the BS 5385 snagging- is this to be done 1.2 meters away from the tiles?

Thanks in advance!