Nextdoor's Noisy plumbing pipes disturbing sleep. Terraced House

The wife's best friend has a problem

She lives in a terraced house.

The pipes make a noise when the heating / hot water is on.

e.g. it comes on at 5:57 each morning, so I assume that this is when the heating comes on.

However, it can occur at other times and has occurred over the summer when the heating would be turned off.

So it could be the hot water system.



It disturbs her sleep.

The house next door is rented out and an agency manages it for a landlord who lives in Australia.

It has got a lot worse over the last six months

The agency has not done anything about this.



Is there any legal action that could force them to sort this out?



She is getting quite upset about the disturbed sleep.

We had wondered if it be reasonable to offer to pay for a plumber to inspect the plumbing next door and fix the problem?

Would it be an expensive or cheap job to fix?