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From politics to economics, from tech to the study of how we live, things are changing fast. Old certainties have not been under such challenge for decades.

Each week, we give the whole programme over to a single in-depth, close-up interview with someone whose big idea is bidding to change our world.

Helen’s challenge is to make sense of their new idea, to find out more about the person behind it – and to test what it has to offer us against the failures of the past.

In this episode, innovative young educationalist Kiran Gill tells Helen about her radical ideas for improving the life chances of excluded school pupils - from drawing on neuroscientific research on childhood trauma to reconnecting Pupil Referral Units with mainstream schools. Helen asks her to explain how and why she set up her organisation, The Difference, to put her ideas into action - and how it's working out.

Producer: Phil Tinline