Video: They helped to solve what became known as the crime of the century - the Great Train Robbery. Fifty years ago today the country was stunned by the theft of £2.5m from a mail train.
It wasn't long before the gang was rounded up,and last night 18 police officers involved in the search were commended at a reunion ceremony in Oxfordshire. Sarah Cooper has our report.
Thames Valley Police are live tweeting the Great Train Robbery 50 years after it was robbed of millions as it passed through Buckinghamshire.
We are yet to receive a call. Why? It would later be discovered that the gang had cut all phone lines #GTRcallLog
Pos. Men may be dressed in Railway Employees uniform #GTRcallLOG
It was a crime that stunned the nation. A daring raid the like of which had never been seen before. The Great Train Robbery, 50 years ago tomorrow, is now firmly entrenched in criminal history.
The gang thought they'd got away with Britain's biggest crime, but it wasn't long before detectives got their first lead and swooped on a street in Bournemouth where the carefully planned crime began to unravel. Richard Slee looks back on The Great Train Robbery.
Keith Milner was a Detective Constable at Thames Valley Police at the time of the Great Train Robbery. He recounts the first phone call he received about the robbery.