The father and brother of Norfolk student Hannah Witheridge, who was killed on a beach on the Thai island of Koh Tao, wept as the court room was shown photographs.

Miss Witheridge's family, including her father Tony Witheridge, have travelled to Koh Samui along with the family of David Miller, of Jersey, who was also killed last September.

Yesterday was the third day of the trial of Zaw Lin and Wai Phyo, two Burmese migrant workers accused of murder and rape.

The two men deny murdering Miss Witheridge, 23, and Mr Miller, 24.

Journalists in Koh Samui yesterday reported that members of Miss Witheridge's family broke down in tears when photographs of the University of East Anglia student from the crime scene were shown in court. They reportedly left the courtroom as a police officer told the trial of the injuries Miss Witheridge had suffered.

On Thursday, Thai police said that some key DNA evidence had been 'finished' and could not be retested, which is something the defence team has demanded.

On the same day, Zaw Lin and Win Zaw Htun passed notes to journalists in the court room, pleading innocence.

Speaking before the trial started on Wednesday, the Witheridge family issued a statement in which they said they wanted a fair hearing and 'those responsible for the brutal murder of our precious girl brought to justice'.

Mr Miller's family said: 'Just hours before he died David was talking to us with his usual enthusiasm... we hope to gain a better understanding as to how such a wonderful young man lost his life in such idyllic surroundings in such a horrible way.

'This pain will remain a part of us for the rest of our lives.

'We have borne our thoughts in silence as we have not wanted to influence any court proceedings, but simply want to see justice done fairly and openly.'

Ms Witheridge's family added they were 'united in grief' with Mr Miller's loved ones.