So, once the weather relented in January we were at last able to make some real progress on site. Firstly the external insulation was fitted between the rafters to allow the roofing to continue. Fiddly this with the extended rafter foot needing to be accommodated within the insulation zone, but essential to maintain progress.
Then window fitting could proceed at last, and some experts from the supplier soon had these in place. Remarkably this seems to transform the site and it begins to take visual shape. Extended protection has been applied to protect the PPC finish, and the extended sills look exposed awaiting the insulation placement.
Insulation placement has been a problem as both air and surface temperatures need to be above 5 degrees, so maybe January wasn't the best time to try and do this, but things are warming up and so hopefully we'll soon be wrapped up nice and warm.