gonna do them like in the other rooms with dormers, ive got a upvc architrave from eurocell, like this
http://store.eurocell.co.uk/window-f...k64-x-5-metres
will use a strip around inner edges and but up to them on the wall with another strip. thats how the other windows are done anyway.
the plasterer did question the windows tbh!! my answer was, cos that how the carp done them