High Court judges quashed the original inquest findings, in which a coroner ruled out both unlawful killing and accidental death as reasons for Yousef's death on 2 March 2019.

The teenager's friend Joshua Molnar, aged 17 at the time, was cleared of murder and manslaughter in the same year, saying he acted in self-defence.

In 2021, a coroner ruled she could not reach a verdict of unlawful killing as the precise circumstances of the death "could not be ascertained".

But on Friday, the Makki family were told judges have quashed the judgement and their campaign for a fresh inquest has succeeded.

Lady Justice Macur and Mr Justice Fordham handed down their ruling at the High Court in Manchester and have ordered a new inquest before a different coroner.

During Molnar's trial at Manchester Crown Court in 2019, the teenager claimed self-defence.

He was jailed for 16 months for possession of a knife in a public place and perverting the course of justice by lying to police at the scene.

Yousef's family brought a judicial review in 2022 following the first inquest in 2021, challenging the coroner's finding that there was an insufficiency of evidence on the "central issue", of whether the killing was unlawful.

Lawyers for the Makki family at the inquest into Yousef's death argued that because the standard of proof in a criminal trial is "beyond reasonable doubt" while the standard during inquests is lower, being "on the balance of probabilities", the coroner could conclude Yousef was unlawfully killed.

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However, during the week-long inquest in November 2021, Alison Mutch, senior coroner for Greater Manchester South, concluded she could not be sure of the "precise sequence of events" and ruled out both unlawful killing and accidental death as a conclusion.

Yousef was described by his family as a "bright" and "dedicated student" and had won a scholarship to study at Manchester Grammar School.