Shorebird ID?

The bird in the foreground - sanderling? The other sanderlings (one pictured in the background) all had winter plumage, which makes me doubt myself! Taken yesterday in Thames Estuary, UK

I'm pretty sure it's a sanderling in partial winter plumage

@amur leopard Brilliant, thanks! Small brownish waders always make me nervous...

The Sanderling at the front looks like a Juvenile and the Sanderling at the back looks very much like a Non-Breeding Adult

I think the speckled ones in the back are Ruddy Turnstones, I don't know though.

@EternalPigeon They are!