ISIS has set up “quasi-industrial production” of weapons in Iraq’s Mosul using materials imported from Turkey, a British arms watchdog said yesterday.

Conflict Armament Research (CAR) said in its report that Isis is maintaining a “robust and reliable” supply chain between Turkey and Iraq which has allowed the Wahhabi death cult to produce tens of thousands of weapons — including rockets and mortar shells.

CAR researchers documented more than 5,000 rounds in various stages of production in recently liberated areas of the city, with Iraqi troops seizing over 500 live rounds on the battlefield.

It said Isis had repeatedly bought chemicals to make explosives from one supplier, almost exclusively sourced from Turkey via Syria.

“CAR’s findings continuously reinforce evidence that the group operates a major acquisition network in Turkey and has a direct line of supply from Turkey, through Syria, to the Mosul area,” it said.

Turkey was exposed in late 2015 shipping arms into Syria, presumably for insurgents.

CAR head James Bevan said highly trained fighters would take their expertise with them as they retreat.

“Given that this group is so organised, they clearly see the writing on the wall in Mosul,” he sad, adding he believed Isis had already evacuated its best trained bomb-makers to Syria and southern Turkey.

“They place a very high value on technical capacity and they will do everything they can to preserve it,” he said.