David Cameron faces scrutiny over drone strikes against Britons in Syria

Prime minister justifies ‘act of self-defence’ in which UK citizens fighting alongside Isis were targeted by an unmanned aerial drone outside formal conflictDavid Cameron is facing questions over Britain’s decision to follow the US model of drone strikes after the prime minister confirmed that the government had authorised an unprecedented aerial strike in Syria that killed two Britons fighting alongside Islamic State (Isis).Speaking to the Commons on its first day back after t