I went looking for some Common Sandpiper a week or two ago and drew a blank in the usual local areas. Then I got lucky at Pennington Flash when I wasn't really expecting or looking for them. That's the way it goes with birding. You never really know what you will see.
It's quite a small wading bird, and I was surprised to see it was not too dissimilar in size to the Little Ringed Plover that was close by. I usually see them on their own and for some reason always thought they looked a bit bigger.