David Blunkett and Alan Johnson join Iain Duncan Smith in dismay at DWP’s treatment of benefit recipients’ minor mistakes

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• Carers in the UK: have you been threatened with prosecution?

The “scandalous” prosecution of unpaid carers uncovered by the Guardian must end now and an inquiry must be launched immediately, Rishi Sunak has been told.

The pressure on the prime minister grew as three former work and pension secretaries and Labour demanded to know why thousands of people who care for their loved ones have been hounded for thousands of pounds – and in some cases convicted – after unwittingly breaching earnings rules by just a few pounds a week.