An offshore worker killed his best friend in a road crash after driving at speeds of more than 110mph as the pair returned from a funeral.

Marc McDonald, 31, of Reiss, Caithness, lost control of his modified Mitsubishi Lancer in February 2015, causing Gavin Farquhar, 30, to be thrown out the back window.

A judge at the High Court in Glasgow heard McDonald, a £100,000-a-year deep sea welder, was a car fanatic who also owned a Lamborghini and a BMW.

McDonald, who has a string of road traffic offences, admitted causing Mr Farquhar's death by dangerous driving.

Prosecutor Jim Keegan QC said one witness described McDonald as "going like hell - very, very fast" as he drove on the A99 at Reiss on the way home from his grandmother's funeral.

The court was told McDonald eventually lost control as he tried to take a bend.

Mr Keegan said: "He was able to straighten his car up but it then entered the grass verge colliding with a drain cover, signpost and drystone dyke before hitting a large boulder."

Mr Farquhar, who was not wearing a seat belt, was thrown through the rear windscreen, suffering a fatal head injury.

McDonald was able to walk away from the wreckage but suffered fractures in his vertebrae.

It was found McDonald had an average speed of 113mph during part of the fateful journey.

Lord Turnbull described McDonald's speed that day as "ridiculous" and remanded him in custody ahead of sentencing in February.