Installation was cancelled twice - on the day of the appointment. First time because the fitter was ill and the second time because only one fitter turned up and, due to the size of the window, two were required. The third time only one of the fitters was an Anglian employee (warehouse manager) the other was a general builder/chippie, multi-skilled type. To get access to the outside of the window scaffolding was required. This is hired in and because of the delays in getting started that scaffolding was outside in the drive for 6 weeks. After installation, I noticed three black marks etched in the glass on the inner surface. The representative told me they would send out an engineer to buff theses out. I then made the mistake of paying, because in spite of contacting Anglian 3 times, they have not sent anyone out to fix the marks. Also the fitters damaged my windowsill.On the plus side at least the windows fit, look OK and the room is a noticeably warmer. Lesson learned though - don’t pay until you are 100% happy.