Gyr type Falcon

David Asquith sent thought these photos of a/the Gyr type hybrid Falcon which he saw today around the Swiss Cottages area, between Barton Hill Farm and Warden and Galley Hills.20th January 2013.  A striking bird!

Hybrid Falcon

This large, pale, stocky falcon would have cleared out the Shorelark/bunting field at Warden/Galley Hill if it hadn't already been done by the Sparrowhawk that preceeded it. 

A similar bird was seen at Draycote Water in Feb 2009 - labelled as a Gyr/Saker x Peregrine (see here).

Any thoughts?