Shortly before midnight on 29 December 2014, a tram travelling from New Addington to Wimbledon became derailed near Mitcham Junction tram stop
There were about 20 passengers on the tram, plus a driver. No-one was hurt as a result of this accident.
The derailment occurred at a set of points about 200 metres west of the tram stop platforms.
RAIB has identified two learning points for tramway companies, drivers and others responsible for using spring operated points.