Bloody hell. I'll go and look for this sandpiper then. Two wader species in a day. Remarkable. I got further down river and didn't find a sandpiper, but did find a Yellow-legged Gull. And there was a Common Tern, and a summer plumage Common Gull (niiiiice..).
What is going on? It's like the birding equivalent of Once In A Lifetime...
You may find yourself in another part of the Thames
You may find yourself in a beautiful patch, with a beautiful tick
You may ask yourself: well... how did I get here?