I found this:
Quote:
Kestrel Falco tinnunculus
Rounded and heavily speckled red eggs. Incubation 4 weeks by the female. Britain's commonest bird of prey. Hovers with head perfectly still and then drops in stages onto the victim. Numbers reduced in the 50's and 60's but now recovered.
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I wonder if it's lost or escaped.
Also, I found a reference to a tern with abnormally red eggs (terns don't generally have red eggs) - so this could be a typical bird for the area which as unusual eggs.