2-854-186 - Historic England Archive/Heritage Images

A view from a boat showing the cooling water intake caisson for Coryton Oil Refinery leaving Tilbury Docks, with people on the side of the lock using ropes to guide the structure. During the Second World War, John Laing & Son Ltd had built some of the floating caissons for the Mulberry harbour which were used in the D-day landings. This 4,200 ton concrete water intake caisson was built along the lines of the Mulberry harbour and was towed 8 miles down the Thames from Tilbury Dock to be installed as part of Coryton Oil Refinery in March 1952. It was built between 1951 and 1952.