‘The IPP scandal has toyed with people’s lives. Here’s why I began investigating – and what should happen next’

Amy-Clare Martin has spent the past three years spearheading a campaign by The Independent to end IPP sentences, interviewing dozens of prisoners, families and experts in the process. Here, she explains why it’s possible to balance the vital need to protect the public with what is fair and just – and why Andy Burnham is right to tackle the problem