Superb image James James. I like a lot the pose of the bird with the raised leg and the head lowered, in search for prey items. The light is nice but a bit intense to my taste, not sure, maybe you would tone down a bit the BG and surroundings of the bird to make the godwit pup up from the BG. Just an idea but I will try to play with your image in PS if you do not mind.
I agree with you, the subte clean bg is lovely, I especially like this hunting pose and the raised foot. Composition, sharp detail and soft light all make this shot a winner.
Pose, light and BG are outstading, light is superb and sharpness is great, love the compo and as linda said, the raiseed foot. Congratulations, no nits for me here!