20 August 1989 the pleasure boat Marchioness was hit by the dredger Bowbelle. Tomorrow will be the 25th anniversary of this tragic accident where 51 people lost their lives in the disaster on the River Thames near Cannon Street railway bridge.
The Bowbelle eventually ended up on the bottom of the ocean in 1996 after sand dredging of the coast of Madeira. 25th March 1996 the Bowbelle split in two and now lies of the coast at Ponta do Sol in Madeira.
Below are a few links to some photos of the wreck, and a great video of diving in Madeira.