A Royal Navy petty officer is due to be sentenced for trying to disclose secret movements of British nuclear submarines to Russian spies.
Submariner Edward Devenney, 30, pleaded guilty at the Old Bailey last month to breaching the Official Secrets Act.
Devenney, who had been living at HMS Drake in Devonport naval base in Plymouth also admitted misconduct in a public office.
A submariner has been jailed for eight years for trying to disclose the secret movements of British nuclear submarines to "Russian spies".
Submariner Edward Devenney has admitted collecting top secret naval codes before meeting two men he believed were Russian spies