South Western Railway train derailed on 'unsafe' tracks Published duration 7 February 2018

image copyright James Acheson-Gray image caption The ambulance service said it checked four people for injuries

A train derailed in Wimbledon after a stretch of track was "not inspected or maintained for many years", a report has found

The Rail Accident Investigation Branch (RAIB) said there was confusion between London Underground and Network Rail as to who was responsible.

It said both firms were unable to explain why patrol diagrams varied.

The report added that Network Rail and London Underground could not explain why these diagrams "did not match the location agreed between the two organisations in 1994".

"The consequence of this oversight was that the track was not being inspected or maintained for many years and so degraded into an unsafe condition."

A spokesman for Network Rail said: "It's not clear how the discrepancy between the two boundaries first came about, but we can assure our passengers this has now been resolved."