Win Zaw Htun and Zaw Lin, both 21, deny killing David and 23-year-old Hannah Witheridge, from Great Yarmouth, Norfolk.
The Britons’ bodies were found on September 15 on a Koh Tao beach.
The trial of the two migrant workers from Burma had been scheduled to begin in February, but it has been brought forward unexpectedly, the BBC reported.
At a hearing earlier this month Nakorn Chompoochart, the lawyer for the accused pair, said they had pleaded not guilty to several charges relating to the deaths.
