MI5 have prevented nine terrorist attacks within the United Kingdom in the past year, its boss has told Downing Street officials.
They have also prevented a total of 13 terror attacks within the last four years Andrew Parker head of MI5 has confirmed.
Mr Parker told Theresa May that the defeat of Islamic State in Syria did not mean that the terrorist threat was over.
Mr Parker warned that social media was the new tool being used to incite terror attacks across the world.
Mr Parker has released the figures ahead of the publication of an investigation of the security services and police amid the wave of increased terror attacks within the UK.
The review looks at whether MI5 and counter terror cops could have prevented the five successful terror attacks within the UK.