Torteval, Guernsey contains a bird reservoir that was redeveloped to mark what anniversary?
Torteval, Guernsey:  It includes the westernmost point in Guernsey, and a nature reserve. Diamond Jubilee of Queen Elizabeth II: The Diamond Jubilee of Queen Elizabeth II was a multinational celebration throughout 2012, that marked the 60th anniversary of the accession of Queen Elizabeth II on 6 February 1952.
60th