UK terror threat raised to "severe"

Meaning a terrorist threat is "highly likely"

Home Secretary Alan Johnson has issued a warning that the terror alert in the UK has been elevated from substantial to severe, but he also urged for calm. He said “there is no intelligence to suggest that an attack is imminent.” The highest security level in the UK is critical, meaning an attack is imminent, and Johnson said that more measures had been taken to protect the UK since the failed Christmas bomb attack at Detroit. Security sources say that the decision was made based on activity in Yemen, as well as increased activity in Pakistan—where 75 per cent of the danger to the UK emanate from.

Channel 4