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

The combination of Iranian, Russian and Chinese aggression is deeply worrying: just how much more concerned about security should the country be?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 attack. By the second time, I’d learned to recognise the sound of US planes taking off from their base at RAF Fairford for what it was: a reminder that although Britain wants no part in this war with Iran, we cannot quite escape