Emergency services have been working since the early hours to free people trapped in the wreckage.Today’s derailment is believed to be the first tram crash involving fatalities on board since 1959. London’s only tram network operates in the south of the capital, from Wimbledon to Beckenham Junction, Elmers End and New Addington, via Croydon. The system uses a combination of on-street and segregated running for the 17 miles (27km) of track.. Mayor of London Sadiq Khan said: “I am in contact with emergency services and TfL, who are working extremely hard to get the situation under control and treat those who have been injured. My thoughts are with all those involved in this incident.” The Rail Accident Investigation Bureau is now investigating this incident. The driver was arrested.