Isis is the most likely inspiration for the bomb explosion on the tube train at Parsons Green station. The attempted mass killing is similar to the attacks in Barcelona, Manchester and London earlier this year in that it aimed to murder the maximum number of civilians in the most public way possible.
Isis is stepping up its attention-grabbing atrocities to counterbalance its defeats on the battlefields in Iraq and Syria. It aims to show strength, instil fear and dominate the news agenda at a time when it has lost the savage nine-month-long struggle for Mosul in Iraq and is being defeated in the battle for its last big urban centres in Deir Ezzor and Raqqa in Syria. The caliphate that Isis declared after its capture of Mosul in 2014, once the size of Great Britain, is today reduced to a few embattled enclaves in the deserts of eastern Syria and western Iraq.