Brian Field

From Real Life Villains Wiki

Brian Arthur Field was a crooked solicitor's clerk who was one of the masterminds of The Great Train Robbery. He was the crucial link between the key informant known only as "Ulsterman" (who came up with the idea of robbing the money-laden night mail train and also provided the details of the schedule and contents of the trains) with the actual gang capable of planning and carrying out such a complex and large scale robbery. He was found guilty of Conspiracy to Rob but this was later overturned on appeal and he only served jail time for Obstruction of Justice, basically in relation to arranging the purchase of Leatherslade Farm, which was used as the gang's hideout.