2024 Talerddig train collision

The Cambrian Line is a railway line that runs from in England across the Welsh border to and , passing over the Cambrian Mountains in central Wales. Most of the route is single track, with passing loops provided at strategic points to allow crossings of trains in opposite directions. Since 2011, the line has been controlled by European Rail Traffic Management System (ERTMS), which replaces traditional signalling with in-cab train control. , trains are operated by Transport for Wales Rail. was a station and passing loop at the summit of the Cambrian Line between and . The station opened in 1900 and was closed in 1965, but the passing loop remained in use and is a regular crossing point for trains. In the westbound direction, trains approach Talerddig on a rising gradient of 1 in 80 (1.25%). At Talerddig passing loop, the line is level for about a quarter of a mile (); this is the summit of the line, at an elevation of above mean sea level. From this level stretch, the line descends at a gradient of 1 in 56 (1.79%), steepening to 1 in 52 (1.92%) after the first mile down to the former Llanbrynmair station. In steam days, most eastbound trains needed assistance from Machynlleth up to Talerddig: in some cases, a train might have three locomotives – two at the front and one at the rear. Unbraked goods trains always had assistance at the rear if not also at the front, because of the danger that a broken coupling could result in a runaway wagon. ==Trains involved==

On the day of the collision, the 18:31 westbound passenger train from Shrewsbury to Aberystwyth (train reporting number 1J25) was formed of a two-coach class 158 diesel multiple unit number 158841, built between 1989 and 1992. At the time of the collision, it had 37 passengers on board. The 19:09 eastbound passenger train from Machynlleth to Shrewsbury (train reporting number 1S71) was formed of another two-coach class 158 unit, number 158824. It had four passengers on board. ==Collision==

On 21 October 2024, the two trains were due to pass at Talerddig. The westbound train to Aberystwyth, 1J25, was signalled to enter the loop and wait for the approaching eastbound train to pass it on the main line. Initial investigations indicate that at the time of the impact, the Aberystwyth train was travelling at between , and the Shrewsbury train had slowed to approximately , though the speeds are subject to further investigation. Fifteen people were taken to hospital with injuries, four of them serious, but none were described as life-threatening or life-changing; one passenger subsequently died. He was reported to have had a heart attack. Unit 158824 on the Shrewsbury train sustained severe damage to one of its cabs. This was the second accident that 158824 had been involved in. In July 2008, it collided with a vehicle on a level crossing between Shrewsbury and . Repairs to the unit took seven months to complete. The crash was the first collision between passenger trains in Wales since the Severn Tunnel rail accident in 1991. The death of the passenger is believed to be the first fatality on an ERTMS-controlled line in the UK. ==Response and aftermath==

The Welsh Ambulance Service, EMRTS Cymru, British Transport Police (BTP), Dyfed-Powys Police, Mid and West Wales Fire and Rescue Service. Coastguard and Wales Air Ambulance helicopters also attended the scene. The two trains were separated on 24 October and taken to Machynlleth by rail the next day. The A470 reopened to traffic on 25 October. As a direct result of the accident, Transport for Wales cancelled four services on the Cambrian Line until further notice. Other services were reduced from four carriages to two. Angel Trains, owner of the units involved in the accident, were unable to decide whether or not to repair the trains, as they were likely to be quarantined by the Rail Accident Investigation Branch (RAIB) for several months. The units are due to be replaced by Class 197 trains in 2026, meaning that repairs may not be justified. The inquest into the death of the passenger opened on 30 October. It was stated that the cause of death had not yet been identified. The inquest was adjourned. ==Investigation==

A team of RAIB inspectors was despatched to the accident site. A formal investigation into the accident was opened on 22 October. The RAIB's initial inspection of the track found evidence of low wheel/rail adhesion, and they stated that the possibility the train may have suffered wheel slide while braking would be investigated. A Rail Head Treatment Train had visited the line four times in the previous five days, including the night before the accident. The RAIB published an interim report into the accident on 30 April 2025. == See also ==