I am chuffed to bits that I didn't just follow the pattern - the chequerboard layout it contains is good, but it was so nice to do something original (I don't always have the imagination!).
The finished top is 64"x 88". Too big for the backing I chose before I had my layout brainwave. So Asda has kindly provided some fabulous new duvet covers for me to cut up. Now I need to find the energy to baste and quilt it.