A major cyber attack on the UK is a case of "when, not if", says the head of the National Cyber Security Centre.
Speaking to the Guardian, Ciaran Martin said the country had been lucky to avoid a "category one" attack - targeting infrastructure like energy companies and financial services. But Mr Martin said the UK was increasing its defence capabilities.
His comments came after Gen Sir Nick Carter called for more defence spending to tackle the threat. The head of the British Army said the UK needed to protect itself from "cyber-warfare" from Russia.