Golden Plover - East Moor

Each year we get a pre-breeding flock of Golden Plover on the fields bordering East Moor, one or two pairs will hopefully stay and breed. Recently we have only seen small groups overflying Beeley Moor but had distant views of a larger flock yesterday. I've checked the regular fields but without locating them but this evening had a flock of at least 185 birds flying around Upperloads so they are perhaps using different fields at present. 
Some of these birds have the black belly of summer plumage whilst others are still in winter plumage.

Golden Plover