A single phone call that can change lives - a podcast by BBC Radio 4

Sometimes it's just one simple thing that can make all the difference. We hear from a husband and wife who saw a problem and did something about it. David Carney-Haworth, a retired Police Sergeant and his wife Elizabeth, a Headteacher have set up Operation Encompass. It's an early warning system to help children who are victims of domestic abuse. This is the story of how they did it.

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