Some 72% of large UK businesses reported a cyber attack in the previous 12 months, with many reporting multiple attacks per day. Britain's flagship $1.3 billion policy to prevent cyber attacks by hostile states like Russia risks repeating mistakes after a series of false starts, a report found. The country remains vulnerable to crippling digital hacks that could affect crucial infrastructure, the NHS, domestic networks, and businesses, a review by the independent National Audit Office (NAO) said.