Dave Courtney, who has died aged 64, was a nightclub bouncer, knuckle-duster wielding debt collector and latter-day henchman of the Kray brothers; he was nicknamed “Yellow Pages” for his gangland connections – until he decided to adopt the persona of media-friendly mobster, publishing a best-selling true crime memoir and making a living from television documentaries, films and speaking engagements, while also raising money for charity.