Well, I think it would be easier to ask if there is one, I wasn't asked to take photos of each component, I was asked to photograph certain elements and some cameras are better than others.
That is simply no so.
I clearly stated that it was due to the lack of a potable expansion tank AND poor installation of the plumbing as the idiot who plumbed it used broken pushfits connectors, plastic pipe with no inserts and they couldn't work out what was causing the leak.
There was evidence of their search for the leak, a mirror behind the shower unit where they had tried to look at the piping there, a calorifier that was isolated, another mirror underneath that looking for a leak.
The whole system and most of the pipe connectors had to be replaced because each time I fixed one element another weak component would fail. This was due to the lack of an expansion vessel and the fact that the expansion vessel being used as an accumulator was knackered.
New calorifier, new pump, new accumulator, new expansion vessel, new filter before the pump.