ISLAMIC State’s proclaimed image of a “jihadist utopia” has been shattered by dozens of defections, London-based researchers declared yesterday.

At least 58 individuals have left the group and spoken out publicly since January 2014, International Centre for the Study of Radicalisation and Political Violence researchers at King’s College found.

Some fled after they were disappointed by the “quality of life” in territory controlled by Isis and realised that the image of luxury goods and cars that lured them to join in the first place did not materialise.

Defectors were also found to have left after being outraged with the group’s brutality and disillusioned by corruption in the ranks.

The study said the growing number of defections “shatter Isis’s image as a united, cohesive and ideologically committed organisation.

“Many of its own fighters have deep concerns about the group’s strategy and tactics.”