Coming off the top of the bath there should be a gap of at least 2mm with zero grout in it and sealed up a white silicone, I'd normally colour match but not with black. The grout trapped in there is going to crack and come loose from the bath flexing from stepping in and out. The clear dirty silicone will only get worse. There is no trim where the tiles end, he has just ran a finger of silicone there also. It's seems quite inconsistent but to be honest if he is claiming to be tiler who isn't used to metros that should have raised some suspicion right there as its literally around 50% of my work.
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