POLICE arrested a drink-driver who was caught doing 121mph on a motorway.

PC Martin Willis - who is better known as Motorway Martin on Twitter - clocked the offending vehicle on the eastbound carriageway of the M62 last Thursday. 

It was in the early hours of the morning, at 1.43am.

The vehicle was speeding at more than 50mph over the limit.

PC Willis conducted a breathalyser test on the driver and discovered they were just over double the prescribed limit.

The driver blew a reading of 71 and the legal limit is 35 micrograms of alcohol for every 100 millilitres of breath.

PC Willis arrested the driver, as a result.

He shared a photo of the breathalyser test and speed check on Twitter and said: "A potentially deadly combination."