A woman has been found guilty of injecting a healthy four-year-old girl with insulin, leaving her brain damaged and severely disabled.

Chantell Graham, from Tottenham, injected the young girl on two separate occasions in 2016, despite the girl not being diabetic.

The first dose prompted a seizure while a second dose left her in a coma three days later.

The court heard that Graham filmed the girl as she had a fit on a hospital bed.

The 33-year-old had denied one count of administering a poison or noxious substance with intent and one count of administering a poison or noxious substance so as to endanger life and cruelty to a person under 16 years.

But a jury at Isleworth Crown Court returned guilty verdicts on Tuesday, the CPS said.

​Prosecutor Sally O’Neill QC told jurors during Graham's trial that the girl, who cannot be identified for legal reasons, suffered permanent and “catastrophic” brain injuries and now requires round-the-clock care.

“She was described as a bright and articulate child by her nursery school teacher with no speech defects or behavioural problems, and she had never been seen to suffer fits or seizures whilst she was at nursery,” said the prosecutor.

“As a result of these events, she is now a severely disabled child who is almost totally dependent on others for all her needs and who requires 24-hour care.”

The court heard the girl was hospitalised on June 6 and 9, 2016.

Ms O’Neill said Graham was accused of searching online for the effects of a diabetic coma just a few minutes before allegedly injecting the insulin.

It is said that after administering the insulin, she then searched for “biting tongue in children”, “can tongue biting mean seizures?”, and “can a seizure cause brain damage?”

After Graham's conviction, Cindy Fayefunmi from the CPS called it “a despicable act against an innocent young child".

“She has now been left with significant long-term damage from which she may never recover," she said.

“Graham denied administering the insulin and claimed it must have been someone else, but the prosecution was able to prove that it was Graham who was in fact responsible for the cruelty.

“I hope this conviction provides some comfort and a sense of justice to all those who love and care for the victim.”

Graham will be sentenced at Isleworth Crown Court on 6 September.