Why is knife crime back in the news and what is being proposed?

As Valdo Calocane is sentenced for manslaughter of three people, UK political parties unveil plans to stem use of knives

Tackling knife crime has become an urgent political debate after Valdo Calocane admitted to the manslaughter of three people in Nottingham on the grounds of diminished responsibility.

Last June, he fatally stabbed Barnaby Webber and Grace O'Malley-Kumar, both 19-year-old students, and a school caretaker, Ian Coates, 65. On Thursday he was sentenced to indefinite detention in a high-security hospital.