Consumer Rights Act 2015
Six months or more
After the first six months the burden is on you to prove that the product was faulty at the time of delivery.
In practice, this may require some form of expert report, opinion or evidence of similar problems across the product range.
You have six years to take a claim to the small claims court for faulty goods in England, Wales and Northern Ireland and five years in Scotland.
This doesn't mean that a product has to last six years - just that you have this length of time in which to make a claim if a retailer refuses to repair or replace a faulty product.