HARDtalk

When suicide bombers attacked London on July 7 2005, Andy Hayman was the police chief in charge of Britain's counter-terrorism operations. Now retired, he is free to speak out about the scale of the Al Qaeda threat and the successes, and failures, of the counter-terror response. In his focus on maximising security did Andy Hayman lose sight of fundamental British liberties? He talks to Stephen Sackur.