As soon as I looked at Birdguides I saw that a Greater Yellowlegs had been seen at the reservoir. I immediately jumped in the car and drove to Northamptonshire.
On arrival I paid my £2 and then proceeded to the reservoir and immediately scoped the bird. It was indeed Greenshank like with yellow orange legs that were muddied, strong streaking on the breast and an obvious eye-ring. I did notice quite a lot of white on the back when it stood preening but not having read up on the identification did I spot a problem with it.