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They are just boxed in gallows brackets.
If you are really worried about the integrity of the job you'll need to do two things. First knock on your neighbours door and see if they have their chimney on the othersideof the wall. If they don't then that is a problem as gallows brackets rely on the neighbours retaining their chimney
The second is to unbox the brackets and check they've been installed properly, with a proper beam in-between the brackets, and well rammed concrete to secure the brackets with no movement, in addition to them being properly bolted to the brickwork
Looks like a shit job, did your surveyor access the loft?