Not since 9/11 has the UK faced such a security crisis – and threat to our liberal principles | Gaby Hinsliff

<p>The combination of Iranian, Russian and Chinese aggression is deeply concerning: just how much more concerned with security should the country be?</p><p>The first time the window-rattling roar of a B-1 bomber woke me up this summer, I thought for one crazed second we were under