Backplate retouching shot over the weekend for new sports related project

This is my first backplate test shot for a new sports related photographic project. I am looking for candidates to take part in studio sessions in order to comp and edit into the shot using Photoshop. This was taken at St Annes Hospital in Haringey in the disused part that has recently been earmarked for we have more ugly and boring houses to look forward to that will inevitably replace the late Victorian buildings.