I have great pleasure in recommending Derwent Sash Windows. I had lots of companies come and quote and Derwent were the only people that I was happy to do business with. There was no hard sell. They didn’t ask if my husband would be at home. There was no pressure and no rush. They are very flexible. I have done a few windows at a time. They were also the only company that was able to source and fit some stonework. The fitters are very clean and polite and work really hard. It was a pleasure to have them in my house. I will miss them all once my last two windows are done.