“It was “abhorrent” British citizens had “declared their allegiance” to groups like Islamic State, he told MPs. He said the inability to stop UK terrorists returning home from overseas was “a gap in the armoury” but only pledged cross-party talks on the issue. Powers to monitor suspects in the UK will also be strengthened. In a statement to Parliament, Mr Cameron restated the UK’s backing for US airstrikes against Islamic State militants in Iraq and said he would not rule out participation in similar action in the future. The UK’s terror threat level was raised to “severe” from “substantial” on Friday.”
— BBC News - David Cameron outlines new anti-terror measures to MPs