Parents whose daughter has been missing in Thailand since the tsunami say they are "praying for a miracle".
Charlotte Jones' mother has flown to Thailand to look for her daughter
Charlotte Jones, 23, was waiting for a boat on a beach on the island of Rachatai, south of Phuket, when huge sea surges struck on Boxing Day.
She is thought to be the only tourist from her group still unaccounted for.
Her mother Liz left the family home in Petersfield, Hampshire, on Tuesday to fly out to look for her daughter, who was on a round-the-world adventure.
Charlotte's father Alan, a 57-year-old management consultant, is at home with the couple's other daughter, 18-year-old Victoria.
He said: "My wife could not wait. It's impossible to get through on the emergency lines.
"We are praying for a miracle but every day that goes by, realistically, we think she is lost. It's becoming quite gloomy.
"This is so difficult. Nobody should have to go through this.
"She is, apparently, the only one missing from that island."
The family last heard from Charlotte, a Bristol University graduate, when she rang on Christmas Day.