A (very) early Common Sand?

Comment from Charlie Streets on the Calderdale Moths blog

Of interest to the birders amongst you was a sandpiper sp. briefly seen from the bridge at the recycling plant at Sowerby Bridge. I think it's at the junction of Fall Lane and mereclough road?As I stopped to let vehicles pass I looked down onto the Calder and it appeared from underneath the bridge showing Common Sandpiper type wing bars.It landed briefly on the bank before scooting off up stream in typical sandpiper fashion.It's a while since I've seen a Common Sandpiper in Calderdale so I'm not sure how early this one is?