PC William Eliot, 45, a police officer with the Metropolitan Police Service (MPS) based at Heathrow has been convicted of assault at Westminster Magistrates' Court during an appearance on Monday, August 4.
He had previously been summonsed to appear following an investigation by the Directorate of Professional Standards.
The court heard that during the course of his shift on August 25, 2013, PC Eliot, who was on routine patrol, stopped a vehicle within the grounds of Heathrow Airport on suspicion of taxi touting.
During the vehicle stop PC Eliot grabbed the driver of the vehicle round the neck . PC Eliot alleged that the victim spat at him when he was questioning him about his vehicle.
The victim later made a complaint and the incident was also reported by a colleague.
Following the stop, the vehicle was seized under lawful powers as it was not roadworthy.
Following an investigation by the MPS Directorate of Professional Standards, PC Eliot was issued with a summons to appear before the court.
Detective Chief Superintendent Alaric Bonthron, said: "The evidence put before the court included that of a colleague who reported the incident, this demonstrates that officers are prepared to report wrong doing. Now that the criminal proceedings are complete we will be able to proceed with the misconduct process."
He has been released on bail to appear on Monday, August 18 at Westminster Magistrates' Court for sentencing.