Prisons crisis: is tagging system on verge of collapse?

The government is relying on it to be a critical weapon in the fight to tackle the prisons crisis across England and Wales.

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But is tagging on the verge of crisis itself? With overcrowded jails at boiling point, the plan is to electronically monitor tens of thousands more offenders in the community. But in an exclusive interview, a whistleblower from inside the private monitoring company Serco, tells us even now the system is "not fit for purpose" and is putting the public at risk.

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