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Video of a near-death attempt to cross the tracks has been released by Network Rail.
The footage shows a 14-year-old boy at Cross Keys station in Wales from May this year running in front of a train and jumping on to a platform and trying to board it.
The angry driver leaves the station without him. He was cautioned by police.
Newtork Rail have released video of young boys running across the railways a bid to keep passengers on the platform and off the tracks.
The video shows a group of youngsters at Mill Hill station in North London running from a train onto a platform and then across two railway lines onto another platform.
One youth drops his bag on the track and returns to retrieve it. The group was never caught.
Modern trains are "very fast" and "often surprisingly silent" warned the British Transport Police.
Chief Superintendent Miles Flood was speaking as part of a campaign to prevent people from crossing the tracks, after 41 people died trespassing on Britain's railways last year.
Rail chiefs are pleading with young people - particularly men - not to cross the tracks at stations, after 41 people died last year trespassing on the railway.
Over the last year 270 people have lost their lives crossing the railways tracks, with 16-24 year old males making up four out of 10 fatalities.
Fatalities occurred at both railways and stations.
A survey carried out as part of the campaign to keep people from trespassing, called Track Tests, revealed even though most people agree it is dangerous to cross the tracks, a third (32%) think they would hear an oncoming train in time.
However, 16-24 year old males were more confident and just over half (51%) thought they would hear the train coming if they were on the tracks.