The former school principal of the man who became "Jihadi John" says he was a relatively hardworking student who showed no signs of radicalization.

Jo Shuter, former head teacher at Quintin Kynaston school in London, told BBC Radio on Monday that Mohammed Emwazi was a "hardworking and aspirational young man" when she knew him.

She said he had "adolescent issues" and was occasionally bullied by other students.

Shuter said Emwazi did well enough in school to allow him to gain admission to the university that was his first choice. He earned a degree in computer science at the University of Westminster.

The former principal said neither he nor other students showed signs of embracing radical causes while at school.