Marchioness disaster
The "Marchioness" disaster was a collision between two vessels on the River Thames in London in the early hours of 20 August 1989, which resulted in the deaths of 51 people. The pleasure steamer "Marchioness" sank after being hit twice by the dredger "Bowbelle" at about 1:46 am, between Cannon Street railway bridge and Southwark Bridge.