A Llandeilo grandmother whose husband died after she ploughed into a line of traffic on the M4 has been handed a suspended prison sentence.

Sandra Amos, 74, had been travelling with her husband Royston for 10 hours when she drove into the vehicle ahead, a court heard.

Royston Amos, 82, suffered multiple injuries and died later in hospital.

Swansea Crown Court heard how the couple had set out on January 7 to attend a funeral in Canterbury, Kent. Amos had refused an offer of a lift from her husband’s daughter.

The couple decided to turn back after getting lost near Slough, Berkshire.

They approached the Pont Abraham roundabout at Junction 49 of the M4 shortly before 4.30pm.

Prosecutor Stephen Rees said: "The traffic came to a halt but she did not react, and came into collision with a Renault van in front. The Renault collided with a Citroen and that with an Audi.

"There was no evidence of her braking prior to the incident, and no tyre marks on the road following an investigation."

The van driver suffered a bleed to the brain and concussion, and the Citroen driver suffered whiplash.

Mr Rees said two hypotheses behind the crash were either Amos had become tired, or distracted by a conversation with her husband or by the radio.

Amos had told police she did not have enough time to avoid hitting the van, and denied feeling tired on the journey home, saying she would have stopped if she had.

Amos pleaded guilty to causing death by dangerous driving at Llanelli Magistrates' Court last month.

Defending, Anna Midgely said the crash had caused divisions between family members and asked for Amos not to be disqualified from driving because it would leave her isolated.

Beverley Mancini, Mr Amos's daughter, said in a victim impact statement she knew her stepmother was not capable of driving to the funeral, adding: "The worst thing is this would not have happened if I'd been allowed to drive him that day."

Judge Paul Thomas said dashcam footage appeared to show Amos had "ploughed into the vehicle ahead without seeing it", adding: "The fact you don't see any deficiencies in your driving seems to me as though no lessons have been learned."

He sentenced her to 32 weeks prison, suspended for 12 months, and banned her from driving for 12 months.