Stuart, love the action you captured and good job getting the head sharp. I feel a lower shooting angle would have been stronger but I know it's not always possible. Of course if you were lower you wouldn't have had that nice reflection. Congrats
Beautiful action capture. It's a pleasure to see images of birds interacting in their habitat. One suggestion... maybe cloning part of the pond growth over the out of focus leaves in the upper left corner would eliminate that small distraction.
Action well spoted and captured. bird is very centally placed in the frame. I agree with Richard on the OOF leaves, but I would rather crop a bit off the top and left to get rid of them, this would also move the bird out of the centre of the frame.