AN ABUSIVE man suddenly pulled the handbrake while his partner was driving causing her to crash into a central reservation near Loch Lomond, a court has heard.

Raymond McNab was returning from a trip to the Loch Long Hotel in Arrochar when he ended more than a month of violent and nasty behaviour to the woman.

And it was the moment their relationship ended, Dumbarton Sheriff Court was told.

The 38-year-old pleaded guilty on October 29 to a course of conduct that stretched from May 20 to June 28 this year.

Fiscal depute Dana Barclay told the court McNab accused his partner of infidelity and became aggressive.

He kicked her TV and then assaulted her by striking her to the face and then kicking her to the face, causing a burst lip while a child was in the property.

He left and kicked her vehicle outside after seizing her by the body and taking her keys.

Over the next few weeks, he would threaten her by phoning her and telling her he was going to attend at her home.

He sent messages by Facebook calling her a "cow" and a "sl*t", as well as a "cheating c**t".

Then on June 28 outside the Loch Long Hotel, McNab tripped her and caused her to fall to the ground. He threw her personal belongings at her.

She drove off with him in the passenger seat on the A82 southbound during which he pulled up the handbrake, causing the vehicle to collide with the central reservation.

He later pleaded guilty to the abusive conduct at a property in Curle Street, Glasgow, and at one in Glasgow Road, Clydebank, as well as Loch Long Hotel, the A82 and elsewhere.

McNab - listed in court papers as a prisoner in Greenock - was on three bail orders at the time from Glasgow Sheriff Court.

Last week his defence solicitor said the incident in the car was a "game changer" after spending time at the hotel.

He said: "He accepted responsibility for his conduct and the harm he caused. The relationship had been for the most part a good relationship.

"He obviously had an issue with alcohol and drugs, compounded by significantly poor mental health."

The solicitor said his client had been contacted in custody by his ex.

"She hopes the relationship continues, although has concerns about mental health and addictions," he added.

"He accepts his guilty and acknowledges he has to change and has taken steps while a remand prisoner.

"The court sees the worst of the relationship. It was not always like this."

Sheriff Frances McCartney noted McNab had previous domestic offences and remanded him in custody while reports are prepared.

Sentencing is set for November 26.