Archie Battersbee's family denied chance to take appeal to the UN
They wanted the international organisation to consider whether Archie's human rights are being breached
The family of Southend's Archie Battersbee have failed in their latest attempt to stop the severely brain-damaged 12-year-old having his life support withdrawn.
The Court of Appeal has denied the family permission to take their case to the United Nations.
Earlier this week, it upheld a ruling that life support could legally be withdrawn.
His parents wanted to raise his case with the UN on human rights grounds.
They claim stopping life support would be in breach of the UK's obligations under Articles 10 and 12 of the UN Convention on the Rights of People with Disabilities and Article 6 of the UN Convention on the Rights of Children.
The obligations are supported to ensure disabled people enjoy equal rights and that governments should do they can to prevent the deaths of young people.
After the Court of Appeal ruling on Monday the family was granted a two day stay on treatment being withdrawn to allow them time to launch further appeals.
It's understood they've also been granted Thursday (July 27) - with the possibility they could take Archie's case to the European Court of Human Rights.
Archie's mum Hollie Dance found him unconscious at home on April 7. He has not regained consciousness since.
Doctors treating Archie at the Royal London Hospital in Whitechapel, east London, think he is brain-stem dead and say continued life-support treatment is not in his best interests.
Bosses at the hospital's governing trust, Barts Health NHS Trust, had asked for decisions on what medical moves were in Archie's best interests.
Another High Court judge, Mrs Justice Arbuthnot, initially considered the case and concluded that Archie was dead.
But Court of Appeal judges upheld a challenge by his parents against decisions taken by Mrs Justice Arbuthnot and said the evidence should be reviewed by Mr Justice Hayden.