A cyber-attack on Jaguar Land Rover (JLR) in August has been identified as the most financially damaging cyber incident ever recorded in the UK. The Cyber Monitoring Centre (CMC) estimates the nationwide economic impact cost roughly £1.9 billion. More than 5,000 UK organisations were affected when the attack caused severe disruptions to JLR’s manufacturing operations and supply chain, halting production for several weeks and triggering losses across thousands of suppliers and dealerships. Classified as Category 3 on the CMC’s five-point scale, the incident falls within the £1 billion–£5 billion loss range. The CMC said the attack was focused on JLR alone, but its interconnected supply chain meant the disruption spread widely. Production at JLR’s Solihull, Halewood and Wolverhampton plants stopped for around five weeks, with about 5,000 vehicles lost each week. The CMC estimated weekly losses of roughly £108 million in fixed costs and missed profits. Partial operations resumed in early October, but recovery is expected to remain “slow and complex” through to early 2026, with a brief period of overproduction forecast next year. The CMC found no evidence of ransom demands and said nearly all losses stemmed from operational disruption rather than data theft. The centre called for stronger cyber resilience, better supply-chain mapping and wider access to insurance. It also noted that while the Government has guaranteed a £1.5 billion loan facility to support JLR, none of the funds have been used.