Perhaps the bird of the Scilly season for many this individual would often spend long periods in Standing Stones field where it was often difficult to see. I was fortunate enough to be in the hide when the bird dropped in.
An image of a Common Snipe is below for comparison. Taken at the same location and from the same hide though the following day and in improved light
Wilson's Snipe - The Lower Moors, St. Mary's, Isles of Scilly October 2007