The Thames Barrier is a retractable barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges moving up from the North Sea. It has been op
View of the barrier gates, which are closed when a high tide is forecast
Far view of the River Thames Flood Barrier
The barrier from Silvertown on the north bank of the river during normal operation, looking across to New Charlton
One of the gates in underspill
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 boat Marchiones
Thames Barrier
…a little and, at the Thames Barrier, the 9 November 2007 storm surge did not completely coincide with high tide. On 20 August 1989, hours after the Marchioness disaster, the barrier was closed against a spring tide for 16 hours "to assist the diving and salvage operations". The barrier has survived 15 boat collisions…
The port side of Marchioness, showing the point of the second impact from Bowbelle. The wooden planking on top was the floor of the upper saloon, which was ripped off by Bowbelle's anchor.
Aerial view, from the south bank, of Cannon Street Railway Bridge (nearest to the camera) and Southwark Bridge. The Millennium Bridge, visible at the top of the picture, was not yet built at the time of the crash.
Looking upstream to Cannon Street railway bridge, scene of the disaster
Simplified version of the incident, according to the Marine Accident Investigation Branch investigation. (Not to scale)