Leaked CCTV footage has exposed the mistreatment of pupils at Whitefield School in Walthamstow, north-east London, where students were confined in so-called "calming rooms." A safeguarding expert likened the scenes captured between 2014 and 2017 to "torture."

While a police investigation into the incidents concluded earlier this year without charges, affected families say they are still grappling with the trauma. The school, under new leadership, reported the footage to the police after discovering it and had already discontinued the use of these rooms.

Disclaimer: This Video is taken from BBC News.