Watch The Krays: Gangsters Behind Bars (2021) Official Trailer

While the Kray twins served life sentences inside, Steve Wraith was their man on the outside.

Steve Wraith had a fascination with the Krays, and after writing them letters Reg took an instant liking to him, even requesting Steve visit with his brother Ron, in Broadmoor. They would go on to ask Steve to take over their business interests in the outside world. As it turned out, this was an exercise in trust, grooming him, as what came next was a stark lesson in just how terrifying the Krays could be, even behind bars.