Complex sentence: An earlier accident occurred at Trinder Park leading to two fatalities (the train driver of the southbound service and a passenger), all units involved in the accident are still in service (i.e. EMU No. 's 11 and 27).
Split into simpler sentences: An earlier accident occurred at Trinder Park leading to two fatalities (the train driver of the southbound service and a passenger). All units involved in the accident are still in service (EMU No. 's 11 and 27).