In the first nine months of 2016, the group lost a chunk of territory the size of Sri Lanka
Isis has lost more than a quarter of the territory it once controlled in Iraq and Syria, new data shows.
Analysis by defence analysts IHS shows that the area under the terror group’s control has shrunk by 28 per cent since its peak in January 2015 as counter insurgents and air strikes push the jihadists back.
In the first nine months of this year, Isis lost a chunk of territory roughly the size of Sri Lanka as the total area under their control fell from 30,115 sq miles to 25,290 sq miles.
But the rate of territory loss appears to have slowed after Russia begins scaling back the number of air strikes against Isis targets.
IHS analysis has showed at the start of 2016 Isis was the target of 26 per cent of Russian air strikes but this had dropped to 17 per cent by the summer as it stepped up its assault on rebels in Aleppo.
In the three months to October Isis has lost just 1,080 sq miles.