Trio convicted of murdering teenager Tyler Donnelly in Feltham

Previously, prosecutor Julian Evans KC said the killing came against the background of drug dealing and the “inherent” danger it posed.

Shortly beforehand, two people had used the “John line” to order drugs and gone to the park expecting to meet Donnelly.

Instead they encountered Preddie, who one of them knew as P, along with the two others in face coverings or balaclavas and carrying knives.

The men appeared “hyped” and when asked to leave the park, the drug users did as they were told, jurors heard.

The “sustained and targeted” attack on Donnelly took five minutes and was not caught on camera or witnessed by anyone, jurors were told.

The victim was stabbed several times, with a fatal injury to the neck.