What is an Edwardian conservatory you may ask, and just how is it different from a Victorian conservatory? Well to answer that question it is really necessary to look at the shape of the conservatory and the roof.
The Edwardian conservatory is generally oblong in shape and often sticks out further from the building than its width. An Edwardian consevatory will not have a bay which differentiates it from the Victorian conservatory.
Additionally you can get an L-Shaped edwardian conservatory which is invariably a proper right angled "L". All Edwardian conservatories will have a roof ridge, although with the L-shaped Edwardian this will sometimes only appear on the longer of its lines.