Contact has been made with a number of Irish tourists thought to have been at risk after the Indian Ocean tsunami struck Asia last week. However, fears remain for the four people deemed to have been "high risk" missing persons.
The four are: Ms Eilís Finnegan from Ballyfermot in Dublin, Ms Lucy Coyle from Killiney in Dublin, Mr Conor Keightley from Co Tyrone and Mr Michael Murphy from Co Wexford.
It is not yet known how many have been contacted but this morning's figure of 40 unaccounted for, is believed to have dropped.
The British death toll could reach nearly 200, Foreign Secretary Jack Straw said on Monday.
He told a news conference that, in addition to the 40 confirmed deaths, 159 British nationals were "highly likely to have been involved as victims of the disaster".
"The presumption has to be that a significant proportion of them have been killed," Straw told a news conference. Most of the British casualties were on holiday in Thailand, one of several Indian Ocean countries devastated by the waves.
The British government has pledged £50 million in aid to the region and says it will almost certainly match the contribution from the public, which stands at over £60 million.