A man has cheated death after escaping with minor injuries when he was hit by a train.
The man was cycling over a foot crossing as the train approached and the driver was unable to avoid hitting him.
He leaped from his bike just in time to avoid serious injury or death.
A witness who was driving by at the time said the man was limping and shaken.
The incident was at a foot crossing from Old Stoke Road to Mandeville Road and resulted in two train services being cancelled, with a further 12 delayed.
The injured man spoke briefly to police on the phone after the witness called to report the incident, but did not leave his details and walked off, leaving his mangled bike at the scene.
Police are now trying to trace the man so they can speak to him about what happened.
Gavin Brown, a BTP spokesman, said: “We aren’t treating the incident as suspicious, but we’re concerned for the man’s welfare and need to talk to him about what happened.
“It is sheer luck that he was not seriously injured or killed.
“If you were the man involved, or know who was, please get in touch.”
Paramedics rushed to the scene but by the time they got there the man had gone.
He was last seen heading across Mandeville Road and into the adjacent housing estate following the incident, which took place shortly before 6.50am on May 24.
Police have been looking for the man in the area and have made checks with the accident and emergency department at Stoke Mandeville Hospital, but have turned up no clues so far.
The man is black and around 5ft 10in tall. He was of medium build, with short hair and was wearing a green and black shell suit jacket.
The driver of the 6.44am Aylesbury to Marylebone Chiltern Railways service sounded his horn and applied the emergency brakes when he saw the cyclist, but was unable to stop before striking him with a glancing blow.
The driver quickly reported the incident to transport police.
Andrew Munden, operations and safety director at Chiltern Railways, said: “Cases such as these are thankfully rare nevertheless they are a very frightening experience for both the person involved and for our driver.
“It is incredibly important to observe the safety information when using crossings near the railway to avoid putting yourself in serious danger.”
Mr Brown said: “Trains can approach quietly and often when you do hear an approaching train it can be too late to move out of the way.
“Also, unlike cars, trains can’t swerve to avoid people or items in their path and it can take up to the length of 20 football pitches for a train to stop.”
Anyone with information should contact British Transport Police on 0800 405040, or via text on 61016, quoting reference 60 of May 24, 2013.