The UK’s terror threat level has been raised from severe to critical, meaning a terrorist attack is considered imminent.
Prime Minister Theresa May made the sombre announcement in a live television statement from Downing Street.
The move comes because authorities have been unable to say for certain that the perpetrator of the Manchester Arena attack, in which 22 people were killed and 59 others injured, was working alone.
The UK’s international terrorism threat level is set by the Joint Terrorism Analysis Centre (JTAC), based in MI5 headquarters in London. Read more at iTV.