One saw a post on moneysavingexpert.com

House Cracking - NHBC Claim - MoneySavingExpert.com Forums

QUOTE:- You should also note that you have to raise legal proceedings within 5 years of being "aware" of a problem. After this you are time barred.
If this drags out and approaches 5 years then your solicitor can issue a writ which can be frozen in order to protect your legal position. END QUOTE

Generally we understand it to be 6 years.

Can anyone throw any light on this?