However that brown spotty blob in the middle of the image is a Spotted Crake.
I arrived early at BMW and got lucky straight away as the bird was standing out in the open preening itself only for a brief moment before skulking back in to the reeds.
A special thanks to Alex who originally found said bird, and who I bumped in to at Carr Lane pools this evening looking for the Pec Sand which after a frustrating search among a Dozen Dunlin I relocated.