Moving on past the window I started marking and putting up battens around the next wall. As I have been buying timber in 2.6 metre lengths I needed to bring the supports for the next section closer so as to span it. I used the same box sections as I did everywhere else in both corners with a leg for support.
At this point I used the same box units as everywhere else only a lot narrower to span the window. The upper two I used smaller sections of timber. The result does brutalise the window somewhat, but this is now well and truly a model railway layout room and not somewhere to put flowers on the window cill and stare out into the garden :0)
I've since painted the outside facing and underneath of the window sections in a dark brown paint as they were very obvious from the outside. This has made them very much disappear.