Not totally sure, Sunlight is obscuring head but might be a couple of dark stripes and the beaks look like a whimberels
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You seem to have persuaded yourself they are Whimbrel...then gone for Curlew! Front one looks like a Whimbrel to me.
My Flickr photos...
Going for the whimbrel Beaks look more like a whimbrel's to me
Lat/Lng: 51.0, -4.2
OS grid ref: SS4832