The trial of Barry Rogers and his mother Penny John, who are charged with murdering 84-year-old Betty Guy in Johnston, has been held up by "unforeseen circumstances."

John, aged 50, had been due to enter the witness box at Swansea crown court today to give evidence about what she says happened to her mother in the early hours of November 7, 2011.

But the trial did not resume at 10.30am as scheduled and was put back to 1.30pm.

The judge, Mr Justice Clive Lewis, told the jury that the delay had been caused by "unforeseen circumstances" and for those same circumstances the trial could not resume in the afternoon either.

He said that "hopefully" the trial would continue tomorrow (Thursday).

Rogers, of High Street, Fishguard, and John, of Union Terrace, St Dogmaels, deny murdering Mrs Guy.

The prosecution claim that John fed her a cocktail of drugs and whiskey and that Rogers "finished her off" by placing a pillow over her face.

At first her death was put down to natural causes and her body was cremated at Narberth four days later.

Rogers has told the jury his grandmother was already dead when he arrived at her bungalow home.

John told police after her arrest that her mother had died from natural causes.