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Hackers had scrambled Redcar and Cleveland Council's IT systems and would soon demand payment to restore it.

The BBC has been investigating how the attack on Redcar and Cleveland unfolded, what it took to get things back to normal and the impact on local people.

A year later, in February 2023, a group of Russian hackers were sanctioned by UK and US government over a string of attacks on businesses, schools and councils, including Redcar and Cleveland.

"Redcar and Cleveland was a crisis," he said.

Redcar and Cleveland Council and Middlesbrough Council also took part in the trial.