Seen flying over a resivoir
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There is no real reason why this could not be a Whimbrel. Perhaps the bill looks a bit long, but the detail of the photos is not great. One of those which will get added to the carousel for a species purely on the basis that it is 'likely', I suspect.
Personally, I would leave it at Numenius, but there are more important things to worry about, I suppose... ;)
My Flickr photos...
...could be whimbrel - for the same reason as you have highlighted (bill) went for curlew. The weather is one of those things that I am worrying about (well grieving about) - fed up now - give me sunshine.
Lat/Lng: 51.2758, -2.8013
OS grid ref: ST442532