TRANSPORT for London (TfL) has been accused of keeping a safety audit on oversight of driver fatigue secret from investigators looking into the fatal Sandilands tram crash.

In November 2016, seven people were killed and dozens more injured when a tram travelling more than three times the speed limit derailed at Sandilands junction on the Croydon Tramlink network.

In December, the Rail Accident Investigation Board (RAIB) found that the risk of trams overturning on bends was not properly understood by the operator Tram Operations Limited, a subsidiary of FirstGroup which runs the tram system on behalf of TfL.