Last night I sent the images and details off to Jeroen Reneerkens who is heavily involved in the Sanderling ringing and sightings reporting.
Within an hour he replied and attached the full log of 66 sightings of this particular bird.
It was first ringed at Sandgeroi - first beach, Iceland during May 2009,
and since then it has shown a remarkable consistant loyalty to its summer and wintering locations
Sept 2009 St. Mary's Island
May 2010 Sandgeroi- first beach
Sept 2010 St. Mary's Island
May 2011 Sandgeroi- first beach
August 2011 St. Mary's Island
I noted from the log that I had seen and reported this same bird in Jan 2010