The mastermind of the Hatton Garden heist, Brian Reader, has died, aged 84. The infamous gangster, from Dartford, made more than £200 million from a series of raids including the robbery which took place over the Easter weekend in 2015. Known as “The Guvnor”, a death certificate shows he died in September last year, after being diagnosed with colon and prostate cancer, but The Sun has reported his family tried to keep it a secret. Leader of a gang known as the Diamond Wheezers, he and his crew were responsible for one of the most infamous robberies in British criminal history when they stole g…