A former gang member is warning youngsters not to make his mistakes

A former gang member is sharing his experience with young people to help them learn from his mistakes.

Gavin McKenna holds sessions with young people in Brentwood, Essex.

The 28-year-old grew up in London and witnessed drug dealing and stabbings from the age of eight.

"I do it because I can't sleep at night at the thought of anyone else dying," he said.