Missives 2 year Supersession Clause

Hi All

Any Lawyers out there who can advise how to get round 2 year supersession clause in missives? Says court proceedings must be raised inside 2 years based on date of entry.

Consumer Protection Act?? (UNFAIR TERM)

Relevent date apply??

Unfulfilled obligation not applicable Contract Act
Builder hasn't dealt with 10No major non compliance with Building Regulation NHBC Technical Standards and associated British Standards.

NHBC are looking for damage rather than no compliance/latent defects