A man in his 60s died and 15 others were injured after a head-on collision between Talerddig and Llanbrynmair

Rail investigators are working to establish the cause of the first head-on train crash in the UK this century, which killed a passenger in his 60s on Monday evening.

A further 15 people were treated in hospital after the collision between the Welsh villages of Talerddig and Llanbrynmair on the largely single-track Cambrian line.