I had existing secondary glazing replaced. Their 'surveyor' suggested slot in panels of 3 out of 5 windows. The 2 hinged ones are fine, the slot in do not fit and condensation appears between them. For 2 years I have been trying to get them to repace the slotin ones with hinged. I have had 2 visits from their engineers who bothsaid to me that they were too large and should not have been fitted. It is impossible to get to talk to any manager at Anglian. even their CEO is unwilling to engage. I went to the industry mediation service- after a year they washed their hands of my complaint. Anglian have offered to change the windows if I pay over £1000 for them!! I have already paid £2500 for something that is worse than the old ones. They now no longer sell the style of glazing they sold me so I guess they had lots of complaints! My only option is to pay about £700 for an independent survey and take them to court. It is so frustrating. The company ethos from top to bottom is appalling.