High migration 200+ birds. Herts UK (1 Viewer)

Evening All,
Was out in the garden counting the increase in gulls heading to their wintering quarters at 7.45pm when high above I noticed a long line of birds heading south east. Basically in a flattened m shape. I think golden plover, however, does anyone know of a particular wader sp that flies high, at speed, in such an obvious formation. By flattened m, I mean a long line with a few lagging behind at the end of the flock. Sorry if not too definitive, but by the time I went in, got bins, they were a long way off. Must have been at 3000 feet.
cheers and thanks for any suggestions.
best regards,
Jono

Golden Plovers sound a good option, but in August Dotterel is definitely a possibility too, I now they fly very high, but I don't know if there are flocks of 200+ in UK.

Hi Valery,
200+ dotterel would be an amazing find! The shape of the flock was so distinctive and I've watched similar in North Norfolk with golden plover, however, the speed was surprising.
Thanks for the reply.
Cheers,
Jono

Sounds good for Golden Plover, particularly as they were moving fast.

Thanks, Chris. By fast, I estimated somewhere around 40mph+ They were gone in less than a minute and the garden gives a wide angle of sky view. Very impressive sight.
Cheers,
Jono