MI5 agent, has escaped the clutches of the Official Secrets Act only by going into hiding abroad.

ECONOMIST: I spy an accountant

Mr Shayler, currently in exile in France, faces attempts in the UK to prosecute him under the Official Secrets Act.

BBC: David Shayler

The former MI5 officer was found guilty of disclosing information, documents and information from telephone taps in breach of the Official Secrets Act.

BBC: David Shayler and Annie Machon

Simon Chesterman, a law professor at the National University of Singapore, notes that Britain's tough Official Secrets Act would also outlaw WikiLeaks' actions.

ECONOMIST: An American trial is drawing nearer for Julian Assange

What lies inside was once subject to the Official Secrets Act.

ECONOMIST: Snooker, piranhas and a hotline to Moscow

He earned his PhD in Physics at the University of Bristol and in 1942 was granted British citizenship and even signed the Official Secrets Act.

BBC: Spy leaked secrets 'like sieve'

Casburn, who will now face Met Police disciplinary proceedings, was accused of a separate charge under the Official Secrets Act but the prosecution offered no evidence.

BBC: April Casburn jailed for News of the World leak offer

He says Congress had always rejected a U.K. style Official Secrets Act, and that it was the role of the press to disclose wrong-doing by government officials.

FORBES: WikiLeaks: Why It Matters...Or Maybe It Doesn't

The only plausible conclusion for your failure to give this assurance is that you were aware that Damian Green, or another Member of Parliament, was the subject of the investigation - conducted not under the Official Secrets Act, but an antiquated common law misconduct offence.

BBC: In full: Dominic Grieve's letter