A GRIEVING mother will never know why her son's car veered into the path of a tipper lorry a week before Christmas killing him instantly.

Callum Jeycock, of Grange Road, in Banbury, was pronounced dead at the scene of the accident the morning after spending the evening at a cinema with his new girlfriend.

The 20-year-old builder was driving along the A4260 from Adderbury towards Deddington at about 7.30am on December 18 last year when his Ford Fiesta collided with the HGV travelling in the opposite direction.

At an inquest yesterday senior coroner for Oxfordshire, Darren Salter, said there was no explanation for the car to drift on to the wrong side of the road.

Mr Jeycock's mother, named only as Fiona, wept as she listened to the evidence.

Mr Salter said the young man had spent the evening before the crash watching the latest Star Wars film with his girlfriend of two months, Milena Tomandlova.

Mr Jeycock left Miss Tomandlova's house in Banbury at 6.40am the next day.

The coroner said: "Mr Nadir Niazi, a taxi driver was driving behind Mr Jeycock. Mr Niazi said he saw Mr Jeycock's car drift to the wrong side of the road."

As the vehicles collided, the HGV driven by Kevin Ryan veered off the carriageway.

Mr Ryan said in a statement: "I saw headlights come out from oncoming traffic and on to my side of the road. It approached so quickly I thought the car had come out of the ground."

A toxicology report produced by Professor Ian Roberts, a consultant pathologist at the John Radcliffe Hospital, said there were no toxins in Mr Jeycock's body and that he died of "multiple injuries". He said death would have been instant.

Mr Salter said the court could only speculate why Mr Jeycock had drifted into the opposite lane of traffic.

He concluded that Mr Jeycock died as a result of a road traffic collision.