The son of Rangers legend Ally McCoist has been warned he faces jail for leaving a man with horrific injuries after mowing him down at high speed in his sports car.

Argyll McCoist, 20, was uninsured when he ran a red light in Bishopton and struck Stephan Murdoch at a pedestrian crossing before driving off in his Audi.

Mr Murdoch, 21, was rushed to hospital, where he was treated for a fractured skull, bleed on the brain and broken leg.

He spent six months on crutches, had to quit his job as he could no longer stand for long periods and still feels pain in the leg that was broken.

Paisley Sheriff Court heard that Mr Murdoch also has memory and eyesight problems and bears the emotional scars of the events of December 3, 2016.

It was stated that he rarely leaves home and panics when crossing the road.

The details emerged last week when McCoist, of Houston, appeared in the dock to face five charges.

He admitted driving without insurance and causing serious injury to Mr Murdoch by driving dangerously.

The Crown accepted his not guilty pleas to charges of failing to stop at the scene of an accident, failing to report an accident to police and failing to tell PC Brian McNab who had been driving his car when the incident occurred.

McCoist sobbed in the dock as procurator fiscal depute Pamela Brady told how Mr Murdoch was struck at around 9.30pm as he used a pedestrian crossing in Greenock Road, Bishopton, near the junction with Kingston Road.

She said: "Witnesses observed the car driven by the accused approaching the lights and witnesses describe the car as travelling at excessive speed.

"The car seemed to swerve to the right before striking the complainer. The car then drove away, the accused did not stop at the scene."

Mrs Brady said McCoist's car was identified "through debris left from the car at the scene" and it emerged he had been driving.

She added that Mr Murdoch now works in a call centre as it allows him to sit down but that he has to keep his leg moving regularly so it does not seize up.

"He advises he does not go out as much as he used to," she added. "He becomes particularly anxious when he has to cross a road.

"He has also developed problems with sleep and becomes sick and nauseous when he lies down. This results in him becoming agitated.

"He has had to attend his GP regarding issues with sleep, anxiety, depression and pain."

Defence QC John Scullion, representing McCoist, said his client had "failed to notice" that the traffic lights had changed.

He added: "When he saw him, he swerved but he was too late to avoid striking him and he panicked and drove off from the scene.

"He expresses remorse and it appears both genuine and profound."

Mr Scullion pointed out that McCoist was just 18 at the time of the collision and said his insurance had lapsed the day before he struck Mr Murdoch.

As he called for background reports to be prepared ahead of sentencing, Sheriff Colin Pettigrew warned McCoist he could be jailed.

Sheriff Pettigrew told him: "This is a serious matter. All options will be open to me."

He then banned the youngster from driving and told him to return to the dock next month to be sentenced.

McCoist's dad – dubbed 'Super Ally' by Rangers fans during a 15-year spell where he became the club's record goalscorer – was not in court as proceedings took place.