A DRUG driver was clocked doing 90mph on the A55 in Flintshire.

North Wales Police's Roads Unit said the driver was stopped by officers on the A55 (westbound) at Caerwys westbound after being clocked doing 20 mph above the speed limit.

However, the driver also tested positive for cannabis at the roadside and was subsequently arrested and taken to custody for further tests.

They have been released under investigation pending the results, and a ticket was issued for the speed, police said.