Keywords: london london olympics 2012 londonolympics2012 2012 london england londonengland london olympics londonolympics olympic olympic games 2012 olympicgames2012 olympic rings olympicrings tower bridge towerbridge xxx olympiad xxxolympiad olympic games olympicgames games of the xxx olympiad gamesofthexxxolympiad city of london cityoflondon river thames riverthames thames pool of london pooloflondon twenty twelve twentytwelve xxxth olympiad xxxtholympiad 30th olympiad 30tholympiad λth olympiad λtholympiad games of the λth olympiad gamesoftheλtholympiad olympic logo olympiclogo logo olympiad queen's rowbarge gloriana queensrowbargegloriana rowbarge gloriana olympic flame olympicflame torch relay torchrelay london bridge londonbridge a3 london2012 london2012 olympics london2012olympics Safety on the River Thames. PLA. Port of London Authority METROPOLITAN POLICE MARINE POLICING UNIT Safety on the River Thames. PLA. Port of London Authority METROPOLITAN POLICE MARINE POLICING UNIT |