I would imagine it would since it is a modification to the original spec of the vehicle.
If you declare it to your insurance then the might allow it but I definitely would not do it without speaking to them first.
It may surprise you to know that your pump is in very good condition compared to the majority that I have seen. I wouldn’t recommend removing it unless you have a real good reason to do so as it will introduce problems that did not exist prior. I think you will get many more years from it if you leave it be.
Joe was right, all was not that bad as it seemed. It’s just rust on the bracket and a bit on a motor housing.
So I have managed to take the bracket out. A bit of a puzzle to wiggle it out but nothing too terrible. The pump stays hanging in place, it is quite nicely supported by its brake lines, just needs to be gently positioned to rest.
The bracket has undergone a serious de-rusting treatment, and voila:
The motor casing has also been cleaned and for future proof it has been painted.
Important thing to note, the groung for the motor goes via the bracket. So it is vital to make sure there is a good continuity b/w the body and the bracket and then from the bracket thru the wire to the motor.