British Extremists Fighting For 'The Islamic State' (ISIS) Are The 'Most Vicious and Vociferous' - Expert Says

British extremists are among the "most vicious and vociferous fighters" in Islamic State (Isis) ranks in Syria and Iraq, a jihadism expert has said.
Sunni Muslims from the UK are taking part in the conflicts "in every way", according to Shiraz Maher from King's College London's International Centre for the Study of Radicalisation.