At last! The new window is in place. All I've got to do now is make good the paintwork and give some thought to the next project.
It's taken a long time because of Christmas and not feeling at all like doing anything during January, but now it's done I'm quite pleased with it. I have discovered that I have to get my head into the right place to have the right sort of concentration; very different from website design, or leaflets and programmes, etc.; very much hand and eye.