A Commons committee has heard that Mohammed Ahmed Mohamed, who escaped from a mosque in West London, was involved in fighting, attack planning and recruiting for Al Shabab in Somalia.
The Home Affairs Committee is hearing evidence from David Anderson, the independent reviewer of terror laws. Anderson says Terrorism Prevention and Investigation Measures are not a foolproof way of keeping the population safe, adding:
"I'm troubled by the fact that there are cases which can't be prosecuted at all."
More top news
The accident happened on Clapham Road at lunchtime.
Tower Hamlets tops the league, with the population set to soar 25% by mid-2024.
Senior Tory Andrew Boff suggested the new mayor was backtracking on a manifesto pledge to build 80,000 homes a year.