A woman convicted of murdering an 18-year-old in Woodford Green has had her prison sentence increased after an intervention by the attorney general.

Emma Hall, 21, was one of three people jailed for killing Luke Harwood at the playing fields in Broadmead Road, Woodford Green, in May last year.

She was originally sentenced to life for a minimum of 15 years back in April but that was increased to 17 years following a hearing at the Court of Appeal on Friday.

The hearing came after the attorney general Dominic Grieve asked judges to review the case following concerns that the jail sentence was too low.

However his legal team failed to persuade the court that the sentence handed to a fourth person for perverting the course of justice was also too lenient.

Billy Duggan, 20, who was additionally convicted of conspiring to pervert the course of justice, was originally sentenced to two years, suspended for two years, meaning he walked free after the court case.

But judges said that the sentence was fair.

The two other killers, James Danby, 27, of no fixed abode, and Tony O’Toole, 30, launched their own appeal, claiming their original sentences of 25 and 17 years respectively were too harsh.

The judges heard their case on the same day but rejected the duo's appeal, upholding the original jail terms.

All those involved in the case, except for Danby, lived in a shared house in Crow Lane, Romford.

During the trial earlier this year the Old Bailey heard how a woman had come to the home on the day that Mr Harwood had moved in, falsely claiming he was a rapist.

She told the others what had happened and Danby, assisted by O’Toole, viciously attacked Luke.

The trio then bundled him into a car and drove to the playing fields where they beat him to death.

They returned the next day with the intention of mutilating Luke’s body so it could not be identified, but Hall tipped off police who arrested them at the scene.

The trio were also found guilty of perverting the course of justice for burning items of clothing linked to the murder.

A spokeswoman for the attorney general said: "He felt Hall's sentence was unduly lenient.

"He's pleased with the result but won't be making a statement".