Advice relating to building works

Hi all.

I'm looking for some advice.

Recently completed an FRA on a small/medium commercial unit. All pretty straight forward, however, there are building works going on next to the unit -looks like a new unit is being erected.

I noticed that when you open the toilet window in my customers unit, it opens directly into the building site next door

The building work is nothing to do with my customer (they lease their unit). Obviously, I know this is an issue and the building site activities can affect my customers' unit and vice versa, but is there anything else I need to consider? Any other guidance/legislation. I'm certain this wouldn't meet building regs, but nothing I can do about that. This is the first time I've ever come across this so I'm a bit stumped.

The building site was closed when I was there so it wasn't possible to talk to any of the contractors.

Any advice will be very much appreciated.

Happy to answer any questions.

Thanks in advance.