Whereabouts in the UK are you?, there are quite a few members on this forum from the UK and may be able to point you to an installer or two.
I can think of at least 4 that may be up for helping you also, but I will let them volunteer themselves.
( Doctor, Piercer, Ex-Ambo, Enthusiast )
If you “HAVE TO” install it yourself, Contact us first, we will provide you with as much information as possible to reduce your risk.
But at least try and find an installer first.