This week another ransomware cyber-attack, named Petya, struck 150 countries. Victims included the Ukraine Government, Cadbury’s, the global law firm DLA Piper, the advertising giant WPP, the Russian steel and oil firms Evraz and Rosneft, the French construction materials company Saint-Gobain, and the Danish shipping and transport firm AP Moller-Maersk.

The University of Birmingham and EA WorldView’s Conor McKenna discusses the significance of the lateest attack — and repeats what should be done — in an interview on Wednesday with BBC WM Radio.

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