Walking round Dulwich park lake yesterday with my camera, Merlin bird app running and keeping and eye out for anything interesting. Merlin reports that it has heard a Curlew then a minute later a Ringer Plover. I think this is very unlikely (though weird that it apparently heard both waders within a minute), but I thought I'd have a good look anyway.
Watching the lake I see a grey and white bird coming in across the water - too big for the Plover, but got my camera on it as it landed and started pecking round the margin. Zoomed in, got a few shots and worked out it was a Common Sandpiper! Not sure how it got so far from it's natural habitat, but there you go.
I wonder about the Curlew and Plover, but still assume they must have been Merlin getting confused. Keep an eye out though.