A single mother who wants doctors to keep treating her brain-damaged six-year-old daughter has failed to persuade European judges to intervene after losing three legal battles in Britain.

Christian mother Paula Parfitt, whose daughter Pippa Knight is in a vegetative state at the Evelina Children's Hospital in London, had appealed to the European Court of Human Rights (ECHR) in Strasbourg, France.

But ECHR judges have rejected her application after considering written arguments.

Ms Parfitt, 41, from Strood, Kent, said on Friday that she would keep fighting.

Doctors treating Pippa say treatment should end but Ms Parfitt disagrees.

A High Court judge based in London has ruled that doctors can lawfully stop providing life support treatment and allow Pippa to die.

Judges in the Court of Appeal and Supreme Court have refused to overturn that decision by Mr Justice Poole.

Ms Parfitt thinks Pippa should leave hospital and wants specialists to stage a home care trial.

Mr Justice Poole heard evidence at a trial in the Family Division of the High Court in London in December and delivered a ruling in January.

The judge, who heard that Pippa's father is dead, described the case as "heart-rending".

Pippa was born on April 20 2015 and had initially developed normally, but in December 2016 she became unwell and began to suffer seizures, the judge heard.

Doctors had diagnosed acute necrotising encephalopathy.