Two teenage rappers have been found guilty of killing Adam Chambers in Woolwich earlier this year.

Mr Chambers, who was 30, died after being stabbed in the heart with a large combat knife after arranging to meet someone to sell them drugs at the back of a block of flats on June 13.

He was attacked by a 15-year-old boy, who was seen laughing and walking away from the scene with Felou Abadja, 19, the Old Bailey heard.

The pair of teenagers were cleared of murder but convicted of manslaughter and having a blade, and have been remanded in custody to be sentenced on February 2.

Prosecutor Sarah Whitehouse QC told jurors how the defendants had been recording rap music at a studio in Blackheath earlier on the day of the stabbing.

Just before 5pm, Abadja, also known as TV, had called for a minicab to take him to Troughton Road, near to where he had arranged to meet Mr Chambers.

The CCTV showed the victim arriving on his moped and then driving off 12 seconds later.

In that time, the younger defendant, who has since turned 16, had stabbed Mr Chambers, who tried to escape on the moped but collapsed nearby.

Mrs Whitehouse told jurors: "Mr Abadja and (the youth) fled back to the minicab. They were talking and laughing but seemed in a hurry and said "let's go boss" to the driver."

Mr Chambers suffered a wound which was 20cm deep and 7cm wide and was pronounced dead before 6.30pm the same day.

After his arrest at home in Eltham, Abadja admitted being at the scene and seeing the victim fighting with the other boy but claimed he was metres away when the stabbing happened.

The younger defendant was arrested days later and a large Predator Combat knife - later found to be the murder weapon - and four wraps of heroin were seized from his bag.

The 16-year-old went on to admit having a blade in public and possession of class A drugs and Abadja pleaded guilty to having cocaine.

Giving evidence, the 16-year-old told jurors he had stabbed Mr Chambers in self-defence with the victim's own knife.