A Stevenage teenager is among three defendants standing trial for stabbing 17-year-old Champion Ganda in London in 2013.

Amani Lynch, 19, of Canterbury Way, Stevenage, is charged with murder, attempted murder and GBH.

along with Devante Clifford, 20, of Lawrence Street, Canning Town and Marvin Simos, 19, of Canning Town,

Champion suffered up to 11 stab wounds in Sandringham Road, Forest Gate, and died at the scene, on May 9, 2013.

At London’s Old Bailey yesterday, the court heard how one witness, a teaching assistant who worked at Sandringham Primary School, was alerted to an altercation on the street after hearing loud shouting.

He had been waiting for a delivery with two other members of staff when a fight broke out.

But after the shouting continued, all three staff members made their way round to the front of the school to see what was happening.

The witness described seeing two men approaching another pair, believed to be Mr Champion and his friend.

He recalled one of the duo approaching “asking for a machete” who soon after had a hammer in his hand and “tried to hit” Mr Champion in the head with it.

A scuffle broke out which allegedly led to Mr Champion having the man with a hammer in a headlock, before a fifth man came into view.

The witness described the fifth man approaching Mr Champion from behind before stabbing him in his right side.

He then allegedly proceed to stab the 17-year-old in the head twice.

A 999 call played to the court heard the distressed eyewitness tell the operator “he’s stabbed him in the head”.

Paramedics rushed to the scene but were unable to save Champion after he suffered a cardiac arrest.

The trial continues.