I’d imagine him being by the front door having an unusually high footfall past his door at all hours and probably late into the evening is really annoying, it would really piss me off, especially if the entrance door is noisy.
However, it’s tough shit really, she is doing nothing wrong, nothing illegal, neither are any of the guys visiting her, the only things she could be done for is not reporting her earning to HMRC( if she isn’t) and there could be some rule saying you can’t run a business from the flats, both of which require someone to report her to the appropriate authorities, which is unlikely.
