Had windows fitted and they were fine, had a written gurantee for 5 years for any problems arising. Since March this year (2021) have tried to have a misted pane of glass replaced. 3 times were sent photos of the said window to them, which they claimed not to have received. Sent engineer to check and measure for replacement glass. The 3rd time was today when they had assured me 3 weeks ago that the glass would be replaced today. Have left a message on the engineers phone no. advising them that if I have not received a telephone call from senior manager within 2 hours I would seek legal advise from the Which magazine Legal team. Also advised the poor old engineer of this as well. I await their response, but I am not hjolding my breath.