Thought it might be useful to post this link:
https://www.mi5.gov.uk/home/the-thre...at-levels.html
It's part of the MI5 website which shows the current terror threat level and includes the anti-terrorist hotline number. Y'know, incase you spot a terrorist
It's worth noting for those who get scared easily that although the current level is 'Severe' it has actually been at this level for a while, and other times in recent history where no attacks have taken place.