A Thai court has rejected the appeal of two Burmese migrants sentenced to death for the murder of Norfolk student Hannah Witheridge and David Miller from Jersey.
They were killed on a beach on the island of Koh Tao in September 2014.
Miss Witheridge, from Hemsby had been raped before she was killed, while Mr Miller, had been hit over the head before drowning in the sea.
Win Zaw Htun and Zaw Lin, both in their early twenties, were arrested some two weeks later after other suspects were cleared.
They confessed under interrogation, but retracted those statements, testifying that they were tortured, beaten and threatened with death if they did not confess to the killings.
The case hinged on DNA evidence that Thailand's top forensics scientist called seriously flawed.
But police insisted the evidence was solid, and the two migrants were convicted in 2015.
The defence plans to file an appeal to Thailand's Supreme Court, where a final decision will be made.