AN INQUEST HAS heard that there was “a blast of oil and smoke” from a motorcycle ridden by the well-known Northern Ireland sportsman, William Dunlop, just before he was involved in a fatal collision during a race in north Dublin five years ago.

Mr Dunlop was killed in the crash which occurred during a practice run for the Skerries 100 races on 7 July, 2018.

The 33-year-old father of two from Ballymoney, Co Antrim, was a son of another leading rider, the late Robert Dunlop, who was killed in a racing crash in the North West 200 in 2008, and a nephew of the sport’s legendary figure, Joey Dunlop, who was fatally injured in a collision during a race in Estonia in 2000.

The deceased has been competing in the annual races as a member of the Lisburn-based Mar-Train racing team owned by Tim and Sonia Martin.

A marshal on the course, Brian Howard, told the inquest he heard the distinctive approach of William’s Yamaha R1 superbike at around 4.45pm and seeing it “bottom out” when its belly pan – the lowest part of the vehicle’s frame, which is designed to collect any leaking material, like oil – hit the road surface on a small hill on the course.

Howard said he immediately declared a red flag to stop the racing due to the resulting oil spillage on the track.

The marshal said he ran up the road after the rider but could not see anything because of the smoke.

Howard said he heard another marshal call for medics to attend the scene a short time later.

Questioned by counsel for Mar-Train, Damien Crawford BL, he said William’s bike, which he estimated was travelling at up to 170mph at the time, had a “heavy impact” with the road.

A photographer who was also an eyewitness to the crash, John Burke, recalled seeing “an explosion of green leaves”.

“I knew straight away it was a fatal accident,” said Burke.

He recounted how the motorcycle had ended up sliding around 30 yards further down the track than Mr Dunlop.

Another marshal, Thomas Garry, told the inquest he was surprised to find out later that a plug he found on a bank around 200 metres away from Mr Dunlop’s motorcycle was from the vehicle.

Garry described the piece of equipment – which is used to plug the oil sump that is covered by the belly pan – as appearing “ten years old and shattered looking.”

Mar-Train lead mechanic, Alistair Russell, told the inquest that he was “100 per cent sure” that there had been no damage to the motorcycle before Mr Dunlop had started his fatal practice run.

Russell said the deceased was a rider “with masses of experience” who would have remarked if his motorcycle had “bottomed out” during an earlier run on the day as it would need to have been checked.

The mechanic said he had been shown a photo of a hole in the bike’s belly pan taken after the collision which the inquest heard would have caused oil to come in contact with the rear wheel of the vehicle.

“100 per cent William Dunlop would not take this bike out for the last time in this condition,” said Russell.

Questioned by counsel for the Dunlop family, Ben O’Connor BL, Russell accepted that different sized-sump plugs would have been used on the motorcycle over time.

He also acknowledged that a larger sump plug would have been closer to the ground than other plugs.

A scrutineer for the Skerries 100 organisers, Declan O’Reilly, also confirmed that he had found no issue with William’s bike during an inspection at the start of the day.

Questioned by O’Connor why motorcycles were not checked by scrutineers between runs when they also had to be checked the following day for the actual races, O’Reilly said he understood the regulations on inspections were set by the sport’s governing body, MotorCycling Ireland.

The inquest was attended by William’s partner, Janine Brolly, and his brother, Michael, who had also been competing in the Skerries 100 races on the same day.

The coroner, Cróna Gallagher, said a post-mortem had shown William had died as a result of traumatic head injuries and a fracture to the top of his spine which she said were “un-survivable.”

The inquest heard evidence from a number of paramedics who described how Mr Dunlop was not moving after the crash and only had slow, weak, intermittent breathing.

Efforts to resuscitate the rider were called off at the scene of the crash and he was formally pronounced dead at 5.23pm.

A family friend, Gary Ryan, who was attending the Skerries 100 meeting to assist the deceased’s brother, Michael, gave evidence of formally identifying Mr Dunlop’s body.

Ryan said he was at the start and finish line when he was alerted at around 4.45pm that practice laps had been suspended after a red-flag incident.

He was informed a short time later about William being involved in an accident and went to the location of the crash where medics were working on the rider.

Ryan said Michael Dunlop had not wished to go to the scene as it was too disturbing for him.

The president of MotorCycling Ireland, Seán Bissett, said the sports body had approved the course for the Skerries 100 races and had issued a licence to the Loughshinny Motor Club to stage the event.

The inquest heard that the annual race had been operating since 1946.

Bissett said it had essentially been the same course for several years with slight modifications made to improve safety.

He said the 2.2-mile track had been inspected six weeks in advance of the race to ensure there were no issues with the road surface.

Bissett told the coroner that there were no issues with the location of the accident scene at any time.

In reply to questions by O’Connor, Bissett said it was not common for motorcycles to “bottom out” during races.

Bissett described William as being “top of the list” in terms of expertise of riders participating in the event.

The chairperson of the Loughshinny Motor Club, Susan Plunkett, who was also clerk of the Skerries 100 course, said William was a regular rider in the race who would have been familiar with the track.

Plunkett said there had been another fatality during the event in 2015 at another section of the track, while there had also been an earlier death before the Loughshinny Motor Club took over organisation of the event in 1987.

The inquest before a jury of six women and one man will resume tomorrow.

Media reports following the fatal crash suggested the deceased was ready to retire from the sport at the end of the 2018 racing season.

William’s youngest daughter, Willa, was born two months after her father’s death.

William Dunlop had enjoyed a successful career on Ireland’s national road racing scene with a total of 108 wins including four victories at the North West 200 and seven at the Ulster Grand Prix since starting his racing career in 2000.