CCTV shows young children playing and dancing on rail tracks in front of a moving train. Network Rail shared the footage in a bid to show the dangers of level crossings - which they say should not be used as "a playground".
In the footage, two boys can be seen running around and pushing each other out to stand in front of a train. As it approaches, one of the children, wearing a blue adidas T-shirt and black jogger shorts, starts waving and jumping at the green 10-carriage Great Western Railway train that speeds past.
The other boy, in a white top and black trousers, runs away as it advances, and they both can be seen jeering as it leaves. Then, two women appear to run onto the tracks.