The father of two children snatched by their alcoholic mother is appealing for the public's help to trace them amid fears she may have fled the country.
Tamara Dyson, 37, snatched the twins, Vixen Rae and Billy Blu Francis, from a contact centre in Skegness on Thursday afternoon and they have not been seen since.
The children were "at serious risk of harm", a judge sitting at Lincoln County Court said, adding that they may have been taken to the Republic of Ireland.
Judge Heather Swindells said: "Both Vixen and Billy were in foster care because of concerns about Tamara Dyson's ability to look after them, particularly as she has a chronic and dangerous alcohol problem.
"It's the view of the court that the children are at serious risk of harm. Despite the best efforts of the police since Thursday the children have still not been found and there are concerns that Tamara and the children are no longer in the country."
Because of concerns about the children, Judge Swindells took the unusual step of issuing an order under the Children Act 1989 allowing the care proceedings in the case to be reported.
The twins' natural father, 31-year-old Billy Francis, an electrician from Greenwich, London, pleaded for the public's help to find the youngsters.
He said: "I last saw them on the morning of May 20 and I was shocked to be told later that afternoon that they had been taken by their mother. I am livid that this has happened with social services while under their care and responsibility."
Mr Francis added that social services told him Ms Dyson managed to take the children while they were distracted making a cup of coffee.
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He said: "Tamara is just not stable at the moment. She is drinking heavily and I am worried to death. She's a very distinctive woman and she has two kids with blue eyes and blonde hair with her. The kids are my life. I love them to death, I can't describe it any other way. I just haven't got a clue where they have gone."
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