I sent the information to J.W.H. Reneerkens who carries out Sanderling ringing projects and he sent me the following info about the bird:-
Ringed on 16/8/2012 at Giend high tide roost Netherlands.
Sighted 8/3/2013 at Las Palmas beach, Lanzarote, Canary Islands.
Sighted 28/05/2013 at Ameland, Netherlands.
Sighted 29/08/2013 at Puerto del Carmen, Lanzarote, Canary Islands
Amazing to think this bird probably travelled to and from it's breeding grounds in Greenland via Netherlands in between the two Lanzarote sightings too!