Help with leaking soil pipe

Surely that should be covered under a 10 year NHBC warranty, I would look further into that, also may be worth contactig your home insurance to see if its covered.

Maybe worth getting in touch with the Citizens Advice Bureau and see if they can help at all or advise on the best cause of action for you to take.

Hope you get it sorted.

You have a leak, you need to get a plumber out to stop it.

Once a plumber has been out, they can advise you whether it is an installation problem, or just a bit of bad luck that affects us all from time to time. If it is an installation issue, then you can take it up with the home builder, then the NHBC.

Thing is, the damage caused by the leak is covered under your buildings insurance, and that I assume is arranged by the management company. So they need to be a little more helpful than they appear to have been.

So, you need to get the problem fixed, the insurance will pay to repair the damage caused by the leak, and then you can take up the issue of why it is leaking with the builders/management company/NHBC if the plumber says it is a build problem, not just an unlucky leak.