BBC today.

He (David Cameron) also pledged to do everything he could to protect people from UK nationals fighting alongside Jihadi militants fighting in Iraq and Syria if they return to the UK.

"No-one should be in any doubt that what we see in Syria and now in Iraq in terms of Isis is the most serous threat to Britain's security that there is today," he said.

"The number of foreign fighters in that area, the number of foreign fighters including those from the UK who could try to return to the UK, this is a real threat to our country," he said.

"That means stopping people from going, it means arresting people who are involved in plots, it means focusing our security, our policing, our intelligence effort on to that area of the world, on to those people."