The emergency services were unbelievely responsive at the London attacks. 8 minutes to locate and put down these terrorists is as fast as reasonably practical.

For arguments sake they didn't look to target a city like London, and decided to do a quiet, but busy town such as Caerphilly, Cowbridge or Cwmbran.

How long would it take reasonably for the same to happen here, the police to be able to protect us? They could easily kill the same or more people in a place where security isn't on high alert.