A DRIVER who sped past police “well in excess of 100mph” on the A27 has been arrested for drug driving.

PC Tom Van Der Wee, an officer with Sussex Police’s Roads Policing Unit, said the vehicle was spotted by an unmarked police car.

The road has a 70mph speed limit which winds down to 40mph as it approaches the roundabout at Lancing Manor

PC Van Der Wee Tweeted this afternoon: “Vehicle seen travelling well in excess of 100mph on the A27 by one of our unmarked cars.

“We’ve headed over to assist our colleagues with a DrugWipe and have arrested the driver of the speeding car for drug driving.”

The DrugWipe system allows officers to determine in less than 10 minutes whether motorists have the illegal substances in their body, using a swab from inside a driver's cheek.

Any drivers who fail the tests will be arrested and taken to a police station where they will be asked to consent to a sample of their blood being taken.

That blood will then be sent away to be examined and if illegal levels of a drug are found, the motorist faces being prosecuted for drug-driving.

If the driver refuses to give consent, they face being prosecuted for the offence of failing to provide a sample of blood for analysis.

The system came into force in 2015 following the introduction of new legislation that sets legal limits for how much of a substance – both legal and illegal – motorists can have in their system while driving.