Les it was pure chance.
One of those things you never notice until you do a first process. The chopper was flying over my house chasing a bank robber.
There are playing fields and apparently the local PC plod had chased them in and they where trapped.
I quickly got my 350D with Tamrom 18-250 and ran out and started to click away.
There are more to look at here
Choppers
The most amazing thing was that I actually for a change had a fully charged battery and a CF card in the camera, I'm a devil for forgetting one or the other
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Click me I dare you
Canon Eos 5dII, Canon Eos 40D, Canon 17-40
L, Canon 24-105
L IS USM, Canon 100-400
L IS USM, Kenko Pro 1.4 Telecon, Spyder Color and Spyder Print calibration.