Starling roost

I was at Low Barns yesterday afternoon, with a colleague from the photo club, scanning the river for the otter. No sign!
Walking back to the car park we noticed groups of starlings appearing from all directions. Soon there was a large flock of over 1000 birds wheeling over the reed beds.
At one point there were also 3 Sparrowhawks circling and attacking the birds. You can see one at bottom centre in the first image splitting the flock as it flies upwards.
The images are very poor as it was almost dusk.

Eventually the birds poured down into the reed beds and safety.