A solitary large crow was desperately flapping trying to reach it, with the obvious intention of mobbing it. The peregrine obliged and dropped down to the same level of the crow, who courageously tried a clumsy pecking and foot up attack on it. The peregrine then demonstrated how it’s done, turning in a blink of an eye and, in milliseconds, knocking feathers off said brave crow. It (crow) wisely then dropped a couple of hundred feet, but still followed the peregrine, escorting it off the premises of Dover House Road air space. 

The peregrine may have been one of the pair that nested atop Charing Cross Hospital this last couple of years..

with thanks to Bill Young Site 3

Here’s a website dedicated to the peregrines nesting on Charing Cross Hospital