It is a cloudy day. The beach is particularly quiet. The plovers are very active feeding on the incoming-tide.
Passers-by force the plovers back to the dunes.
They return as soon as the coast is clear.
On busy days the plovers do not get an opportunity to feed in the surf.
I have watched for hours how a pair of Oystercatchers unsuccessfully try to feed on the high tide mark.
On warm summer days the beach traffic is uninterrupted.