Ban prevents civil servants from talking to journalists without approval . Critics warned this will 'intimidate ' them into silence and is 'unnecessary ' Line added to Home Civil Service says must have 'ministerial authorisation ' Move was overseen by Sir Jeremy Heywood , Head of Civil Service Code . He 's nicknamed 'Sir Cover-Up ' for preventing Chilcot inquiry into Iraq War .
Ban prevents civil servants from talking to journalists without approval . Critics warned this will 'intimidate ' them into silence and is 'unnecessary ' Line added to Civil Service Code says must have 'ministerial authorisation ' Move was overseen by Sir Jeremy Heywood , Head of Home Civil Service . He 's nicknamed 'Sir Cover-Up ' for preventing Chilcot inquiry into Iraq War .