Small correction on the history, The British Olympia was first built by Chilton Aircraft. See:
The Olympia was built for the Olympic gliding event in 1940, which had to be cancelled. This year, along with the London Olympics, a major gliding event in commemoration of the lost Olympic event is being held in Britain with Olympias from all over the Europe attending. The event is being held at the birthplace of the modern Olympic movement.Details to be found here:
This is a useful drawing from Flight International magazine
Thanks for the extra docs, I like the cut away.