There were 43,516 knife crime offences in England and Wales in the 12 months ending March 2019.

These men have all lost a son or brother to knife crime, and describe the devastating impact on those left behind.

Watch the Victoria Derbyshire programme on BBC Two and BBC News Channel, 10:00 to 11:00 GMT - and see more of our stories here.

Film made by Sarah O'Connell and Sara Al Wajih.