EDIT: It is very doubtful this is an Episode VII Stormtrooper. Devious Matt writes in and points out a Stormtrooper from an exhibit that looks exactly the same:
A reliable friend once again points us towards the direction of something interesting. A Stormtrooper. Maybe a Star Wars: Episode VII Stormtrooper? The visor is similar to how we heard it looked it in the previous reports, a single lens with minor variations. The photo is by Christopher Francis. If anyone knows anymore about this photo, let us know! All in all, if this is a photo of a new Stormtrooper, they’re not that different!
Here are the photos of the Stormtrooper and two other Pinewood Studios pictures which places him at the location:
I lightened this one really quickly so you could see the visor better: