British Transport Police (BTP) wish to speak to two men in relation to a trespass incident near a railway crossing in Gloucestershire.
A South West Coast steam train was approaching the level crossing at Northway near Tewkesbury on the morning of Saturday 20 October 2012, when the driver saw a man on the tracks.
Police believe the man was taking photographs of the approaching train.
The driver stopped the train at the crossing to speak to the man. There he was verbally abused by a second male.
British Transport Police say they would like to identify the men pictured to assist with their enquiries.
Anyone with information can call British Transport Police on Freefone 0800 40 50 40 or the independent charity Crimestoppers on 0800 555 111.