A Brockley thug has been jailed for an unprovoked Halloween stab attack with a 13-inch knife that left a teenager with life-changing injuries.

Jordan Johnson-Ogunkoya, 19, of Turnham Road was jailed for eight years at the Old Bailey today after pleading guilty to GBH with intent.

The 13in knife was discribed by Judge Bate as a "shocking weapon" and said he posed a "high risk of harm".

Police were called to Queens Mead Recreation Ground in Bromley at 11.59pm on October 31, 2014 following reports of two young men having been stabbed after being attacked by a large group of youths.

Officers and the London Ambulance Service attended the scene and found a 17-year-old boy suffering from serious injuries to the abdomen.

A 16-year-old boy was also found with stab wounds to his leg. 

Both were subsequently taken to a south London hospital by the London Ambulance Service.

The 16-year-old victim was discharged a few hours after attending the hospital, but the 17-year-old victim remained in hospital until the middle of December after suffering a large stab wound to the abdomen which severed his bowel in two places and damaged his renal artery.

The victim lost lots of blood and suffered life changing injuries as a result of the attack. 

Judge Bate added: "We see this all too often, young man carrying knives routinely, with grievous or fatal consequences and young lives are left utterly ruined."

Detective Inspector Charles Clare, from Bromley CID, said: "This was a despicable, cowardly and wholly unprovoked attack which has had a significant impact on the life of both the young victim and his family.

"He very nearly died. There was nothing at all to connect the victims to Johnson-Ogunkoya, they were simply the victims of mistaken identity.

"The investigation was exceedingly challenging and I am delighted we have secured this conviction. I would like to thank the bravery of the victim and his family and hope this result allows them to move forward."

Johnson-Okunkoya was identified as the main suspect and arrested on June 25 last year.

He was charged with attempted murder on June 27, but fled the country to Jamaica after being released from court where he was appearing in respect of another case.

He was arrested at Gatwick Airport on December 29 last year.

All the other teenagers arrested were released with no charge in relation to this incident. 

Johnson-Ogunkoya appeared at the Old Bailey via video link from prison on Friday, February 24 where he pled guilty to grievous bodily harm with intent.