Daesh forces may “simply abandon Mosul” and flee to Syria, says Robert Fisk in The Independent. Indeed, allies of Syria’s government suspect that the US is deliberately leaving avenues of retreat open, so that Isis forces can head west to fight the Assad regime. But Isis is being driven back in Syria too, said Raffaello Pantucci in The Daily Telegraph. In time, “a mass of foreign fighters” may be “suddenly left without a home”. Security services are concerned that, like the Afghan veterans of the 1980s, they may return to carry on the fight in their home nations.