Campaigners have expressed outrage at new proposals that could lead to journalists being jailed for up to 14 years for obtaining leaked official documents.

The major overhaul of the Official Secrets Act – to be replaced by an updated Espionage Act – would give courts the power to increase jail terms against journalists receiving official material.

The new law, should it get approval, would see documents containing “sensitive information” about the economy fall foul of national security laws for the first time.