16-year-old Hackney photographer (terrorist?) stopped again

It looks like Jules Mattsson, a 16-year-old photographer and sixth form student at Stoke Newington School, has been detained with the help of a stronger strain of anti-terror legislation... Amateur Photographer: Photographer suspected of being a terrorist outside Buckingham Palace

Apparently, this time, the police used section 43 of the Terrorism Act under which they have to "reasonably suspect" the person of being a terrorist.

Mattsson was nearly arrested under anti-terrorism laws for photographing cadets in Romford (Hackney Hive version here).