Thanks for the reply, we understand the act for new build just that this was built 40 years ago and are trying to find out what the standard / act…

My advice is don't look for more advice on the Internet. Speak with your lawyers and make a call. It seems you have enough of a case and evidence, but…

Sounds like you're in a tight situation time wise but I'd be inclined to refuse handover until the floor is fixed. Sanding floors is messy, noisy, and smelly business,…