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Children's names, pictures and addresses stolen in nursery chain hack

Experts have condemned the hack as an "absolute new low" for cyber-crime.

A group of cyber criminals says it is using the highly sensitive information to demand a ransom from the company, which has 18 sites in the UK as well as some abroad. A "pentest" - or penetration test - is the term for when ethical hackers are hired to assess the security of an organisation in a controlled and professional way. The hack is the latest in a series of high-profile cyber-attacks, which has seen production grind to a halt at Jaguar Land Rover, and caused massive disruption to M&S and the Co-op.

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