Baroness Louise Casey has this week delivered an excoriating review into the standards of behaviour and internal culture of the Metropolitan Police. It’s just the latest of a series of tough reports issued by Casey during a career tackling deep-rooted social issues, including homelessness and anti-social behaviour.

Casey is now a cross-bench peer and go-to troubleshooter for governments of all stripes, but her route to the top of public life has been unconventional.

Profile speaks to close friends and colleagues of a civil servant known for her fearlessness and no-nonsense style.

Presenter: Mark Coles Production team: Sally Abrahams and Nathan Gower Editor: Simon Watts Sound Engineer: Graham Puddifoot