I'm not knocking your work at all in fact the opposite.
You have to start thinking about the pics you will be taking to offer as evidence.
The things i would pick up on in the pics you have posed are more to do with what you are wearing than your tiling.
in 1,6 and 12 you have on a red t shirt in 2,7 and 8 you have a black one on in 5 and 13 it is white and you have protective glasses on your head.
For me it is things like that that say the pic was staged as you did not do all of that in one day and if it was staged was it even your work.
you have to make the assessor have no doubt in his mind that the work in the pic is yours where ever you can have pics of prep work and setting out. To an assessor a pic of a half don job with you fixing a tile or spreading the adhesive is worth more than a pic of a lovely finished job and you stood next to it.