Thirteen Britons have been confirmed dead in the aftermath of the tsunami horror that has devastated Asia.
The Foreign Office said ten British people have died in Thailand and one holidaymaker in Sri Lanka.
In the Maldives, a male holidaymaker suffered a heart attack moments before the devastating tidal wave struck and a woman also died.
The Maldavian High Commission said one victim had been staying at the White Sands resort and another in the resort of Velavaru.
No further details have been released by the Foreign Office.
Foreign Secretary Jack Straw warned yesterday that the British casualty count is likely to rise.
He said: 'We have had a number of deaths of British nationals reported to our embassies and high commissions but they have not yet been confirmed. The numbers will be higher.'
A Foreign Office official in Phuket, Thailand, where Embassy staff have set up an emergency unit to help the thousands of stranded British tourists, said many people had been taken to airports, such as Phuket and Krabi.
He said: 'The Thai authorities laid on a number of extra flights to get people out of the disaster zone and back to places like Bangkok.' He said visitors to some of the outlying islands, such as Phi Phi, were still arriving on the mainland.
He added: 'We are expecting a large number of people from Phi Phi into Phuket this evening.
'Really, the priority is to get people out of the disaster zone and back to Bangkok where, if necessary, they can be issued with travel documents and carry on - either go home, or carry on their way.'
He said the Thai authorities were allowing people on to domestic flights without passports, and where necessary, British officials were issuing emergency documentation for international travel.
The Foreign Office said the genders, ages and home towns of the British dead could not yet be disclosed, but confirmed that next of kin were being informed.
A spokeswoman said there was no news on the fate of a group of 50 British teachers on holiday in the south of Sri Lankan.
It is believed that hundreds of Britons have been injured in the chaos, with more than 60 British names among lists issued by hospitals in Thailand.
Ian Proud, Secretary to British Ambassador to Thailand, David Fall, said that some have broken bones and serious wounds in addition to score of minor cuts.
Information released by the Ministry of Public Health in Thailand records around 35 British men and 23 British women as receiving treatment at Vachira Hospital in Phuket, with several children thought to be among the injured.
Tourist officials said there were chaotic scenes at Phuket's airport as hundreds of foreigners attempted to board flights to Bangkok.
Free flights had been offered to those who wanted to leave the south, in order to ease the burden on the island's damaged infrastructure.