A MAN caught driving while under the influence of drugs has been banned for 140 days.

Donald Johnstone, 56, was snared on Glasgow's M8 motorway near Tradeston on April 13, 2020.

Glasgow Sheriff Court heard that police clocked Johnstone's Volkswagen Golf driving across chevrons.

The vehicle was ordered to stop but was noted to drive the wrong way around a roundabout.

Johnstone stopped and was observed to slur his words and struggled to keep his eyes open.

He told officers that he had taken methadone earlier that day.

Johnstone pleaded guilty to driving while unfit through drink or drugs.

Ashley Pollock, defending, told the court that Johnstone, of Campbeltown, Argyll and Bute, has not offended since.

The lawyer added: "His position is he shouldn't have taken the drug while driving.

"He lives 20 minutes from the nearest town - a disqualification will be a significant punishment for him."

It was revealed Johnstone has an identical previous conviction from 2004.

Sheriff Jonathan Guy put Johnstone on a structured deferred sentence with a review next month as well as the driving ban.