Director General statement on Westminster attack
The thoughts of the men and women of MI5 are with the families of those killed in Westminster yesterday, and with the other innocent people injured in this appalling and disgusting attack. We stand shoulder-to-shoulder with our police colleagues, grieving at their loss while also applauding the professional excellence of their response.
As Acting Deputy Commissioner Rowley said, the security community prepares for such awful events - while working tirelessley to prevent them. The MI5 operational response is fully mobilised in support of the police.