counting coots

What do you get if you cross a flock of loafing Gulls with two overflying Chinooks?

Dread.  Technically.

I've mentioned the prescence of helicopters in the area before (Battersea Heliport is nearby).  Every so often, a Chinook will use the Thames as a navigation aid as it moves further into the city.  Every so often, there are two together and I have seen three fly over.  And what a bloody racket they make.  Friday lunchtime, two flew over and all the Gulls just freaked right out.  The Herring Gulls seemed to take particular offence to the noise and countered the big noisy flying things by flying around and being noisy for 10 minutes or so.  None of the other birds seemed to mind that much.