Petty Officer's leak 'could have harmed security of UK'

It was only through the vigilance of MI5 officers who mounted a sting operation where they pretended to be Russian spies that national security was not harmed, said Mark Dennis QC, prosecuting.

Mr Dennis said: "The potential damage could have been considerable and could have harmed the safety and security of the United Kingdom."

Devenney, originally from Northern Ireland, has pleaded guilty to breaching the Official Secrets Act and misconduct in public office.

Advertisement

Submariner jailed over secrets

Submariner Edward Devenney has been jailed for eight years for trying to disclose secret movements of British nuclear submarines to MI5 agents posing as Russian spies.