Faulty products and disgraceful customer service (nobody wants to speak to you). We spent the extra money and had Anglian fit our windows in 2015, thought we'd get better quality products and after sales, customer service brilliant for first couple of years. Since then various window locks have failed and been replaced, still within 10 year guarantee period. Recently another window lock has failed, have now been told that our existing window locks are obselete and have received a completely different replacement. We will end up with completely different sizes, colours and types of window locks all round the house as they all fail!. Suggested they replace all the locks for continuity as they're obviously faulty and it would be nice gesture, have been told "only at our expense and don't contact them again about it"!!!. Unbelievable.