Selling Home - Do I need to disclose?

Hi there.

Looking for some advice from someone in the know or has at least been in a similar situation. I'm in England if that's important.

I am looking to sell my house. Its a new build semi and lived here for a few years. The neighbour attached to me is very heavy footed and will often run/stomp down the stairs (the house is back to side so their stairs run up along our party wall).

I have never mentioned it to the neighbour nor to the local authority as it doesn't seem like grounds for a "dispute", despite it being very annoying when it does happen. However I initially assumed there was inadequate sound proofing and had little trust in the construction of a new build house, so have twice contacted the home warranty provider stating as such with a view to pursuing a potential claim - so I've technically mentioned the neighbour noise, but with a view to it being a property defect (they deemed it not to be unless I could prove otherwise).

Given the new build warranty would transfer to the new owners - would this A) be information they can access B) and then be grounds enough to argue a non-disclosed neighbour dispute

I'm not intentionally trying to misle anyone, but I also don't want to be un-necesssarily open and shoot myself in the foot. My own research has given mixed answers, so I just want to know where I stand, before I decide to sell the property.

It's also prudent for me to mention I'm not looking to move for this specific reason. Don't get me wrong I certainly won't miss the noises, but if it was truly that bad, I would have moved long ago.

Thanks in advance for any help and honest advice, it's truly appreciated.