Cyber-attack set to escalate as working week begins, experts warn

Europol and NHS fear further disruption when workers switch on computers for first time since spread of ransomware

Health and security chiefs have warned of possible fresh disruption from the global cyber-attack when workers switch on their computers for the first time at the start of the working week.

Europol, the pan-EU crime-fighting agency, said the threat was escalating and predicted the number of "ransomware" victims was likely to grow across the private and public sectors.