Film, starring Keira Knightley, being shot at City Hall

BRADFORD'S City Hall was cordoned off to visitors this afternoon as filming of Official Secrets, starring Keira Knightley, took place.

The film, the cast of which also includes Ralph Fiennes, Matt Smith, Indira Varma and Tamsin Greig – tells the true story of British Intelligence whistle-blower Katharine Gun who, during the run-up to the 2003 Iraq invasion, leaked a top secret National Security Agency memo exposing a joint US-UK illegal spying operation against members of the UN Security Council.