Navy submariner jailed for Official Secrets Act breach 12 Dec 2012 A Royal Navy petty officer who offered nuclear submarine secrets to MI5 agents posing as Russian spies has been jailed for eight years. Edward Devenney, 30, originally from County Tyrone, gathered classified coding material after being passed over for promotion, the court was told. He had been "prepared to betray his country and his colleagues", said Mr Justice Saunders at the Old Bailey. Devenney admitted breaching the Official Secrets Act. He also admitted a charge of misconduct in a public office.