The sloping house roofs on two sides present a slight technical challenge. An orangery roof would have been easier in some respects, but the clients specifically wanted a conservatory to allow as much light as possible into the adjoining rooms. The will require a box-gutter on two sides.
The size of the conservatory is fixed by the two existing walls, although it would be possible to project beyond the rear building line of the house, the clients do not want to do so.