Two students from a school in Bristol were fatally stabbed last month – and the one person many journalists sought out for comment was a Baptist minister. Not because he knew them, but because he heads the academy trust that their school belongs to – along with 53 other schools across the country.

Today's guest is Steve Chalke – activist and writer, broadcaster and social entrepreneur – founded the Oasis Trust nearly 40 years ago. Today it links churches and other community groups in challenging injustice and inequality. Its initiatives range from the big schools network to specialist neighbourhood debt advice, job training, mental health drop-ins for children and young people, and much more. It also works internationally in housing and education and healthcare.

Steve Chalke has never shied away from controversy, not least among the evangelical Christians who nurtured him – he’s been outspoken in his defence of minority groups and some traditional ways of understandings the Bible.