I found that Gowercroft offered both the slim double-glazing and Accoya timber products that I required for this project and when I contacted them Andy was happy to give me a guided tour of their small factory, still in Wirksworth at the time. He then provided quotes for different materials: softwood, hardwood and Accoya. The work I saw was of a high standard and they were friendly and helpful. It seems to be run like a small family business with customer care being a high priority!
The double-glazed windows were all factory finished and fitted by Gowercroft to the satisfaction of myself, my client at Holbrook Hall and the Conservation Officer at Amber Valley Borough Council.