 Complete the following phrase:  In 1977 Dwan was accepted as one of Royal Watermen during the Queens Jubilee Year. Dwan continued to work as a lighterman, but with severance at the docks, he decided to work for himself and withdrew from lighterage and rowing at the same time. For a while he worked on the building of the Thames Barrier, and then on pleasure boats on the River Thames. He then went into business with Bill Ludgrove and set up their own company Thames Cruises. The business grew and they bought a repair yard at Eel Pie Island. Thames Cruises owned the pleasure boat Marchioness which was sunk with loss of life in the 