The father of a 12-year-old boy at the centre of a life-support treatment fight has left hospital after being taken ill shortly before Court of Appeal judges ruled the youngster could be disconnected from a ventilator, a family spokesman has said.

Appeal judges were told on Monday that Archie Battersbee's father, Paul Battersbee, who is in his 50s, was feared to have suffered a heart attack or stroke outside a courtroom at the Royal Courts of Justice in London.

Archie's family is being supported by a campaign group called the Christian Legal Centre.

A spokesman for the centre told the PA news agency today that Mr Battersbee had now left hospital.

Read more >>> Archie's dad in hospital after he 'might have suffered heart attack or stroke'

The update comes after a lawyer representing Mr Battersbee and Archie's mother, Hollie Dance, said they are considering a challenge to the appeal judges' ruling.

David Foster, based at law firm Moore Barlow, said Ms Dance and Mr Battersbee, who are separated but both live in Southend, plan to appeal to the European Court of Human Rights.

Appeal judges Sir Andrew McFarlane, Lady Justice King and Lord Justice Peter Jackson, on Monday, upheld a ruling by a High Court judge who concluded doctors could lawfully stop providing life-support treatment to Archie.

Judges have heard how Ms Dance found Archie unconscious on April 7.

She thinks he might have been taking part in an online challenge.

The youngster has not regained consciousness.

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.