Hayle estuary Cornwall - what have I seen please?

  Caught this one on camera yesterday (2/9/21) at Hayle, Cornwall on the Copperhouse Pool. Didn't think about it until I looked at the enlarged version on laptop. Initially thought it was a greenshank but thought it was out of its usual location for time of the year. Then wondered if it was a bar-tailed godwit...... Any suggestions please? It may be something else entirely.