Searches of the UK and Ireland have continued for two twins snatched from social services by their mother just days before she was to learn whether she could look after them permanently.
On Tuesday it emerged the father of four-year-old Billy Blu and Vixen Rae, who made an emotional plea for their return, had been convicted of actual bodily harm on their mother Tamara Dyson.
Ms Dyson, an alcoholic, has been missing with the children since Thursday after she snatched them from a care centre in Skegness, Lincolnshire, where social workers were supposed to be monitoring a visit from their grandmother.
William Francis, a 31-year-old electrician from Greenwich, south-east London, said he was "livid" about social services' handling of the case.
Ms Dyson snatched the twins from the same contact centre last Monday during a supervised visit but was tracked down and an interim care order put in place.
A second meeting at the same centre was arranged for Thursday with the twins' 61-year-old grandmother Judith Dyson. There were apparently two social workers present but Ms Dyson managed to sneak in and seize them after the social workers became distracted while making a cup of coffee.
Investigations are now under way to find out how they could be snatched from under the noses of social workers.
But Peter Duxbury, director of children's services at Lincolnshire County Council, said no social workers had yet been disciplined or sacked over the issue.
Olympia Dyson, Ms Dyson's 16-year-old daughter from a previous relationship, said her mother was abused by the twins' father, who pleaded guilty to actual bodily harm in October 2008.
It has emerged Ms Dyson was scheduled to have a meeting to see whether she could look after the twins on a permanent basis. But Olympia revealed her mother had been told by social workers there was only a slim chance of that happening.
