Record breaking four nationally significant cyberattacks each week in the UK
According to National Cyber Security Centre (NCSC) in the 12 month period from September 2024 to late August 2025, there were 429 cyber-incidents that required NCSC intervention in the UK.
Of those 204 incidents were classified as “nationally significant” more than double the previous year’s 89. That works out to an average of about four nationally significant cyberattacks every week in the UK.
Among the 204, 18 were labelled highly significant meaning they had a serious impact on central government, essential services, the economy or a large part of the population.
Broader context
The UK is reported to remain the most attacked country in Europe in terms of volume of incidents monitored by entities such as IBM X-Force. The threat environment is described by senior intelligence officials as one of the most contested and complex in decades.
What organisations and individuals should take away
Cyber resilience must be a board level issue. The NCSC explicitly urged CEOs and chairs of major UK firms to take concrete action. It’s not enough just to focus on prevention, attack response planning, continuity of operations, supply chain resilience, and recovery matter.
As one comment: “The best way to defend against these attacks is for organisations to make themselves as hard a target as possible.”
The private sector is firmly in scope. While much focus is on government/critical infrastructure, the NCSC notes private sector attacks can still be nationally significant.
Smaller organisations, and suppliers to big firms are also at risk attacks cascade.
For individuals: ensure that the institutions and services you depend on (employer, bank, service providers) are taking cyber risk seriously. At a personal level, good cyber hygiene (strong passwords, MFA, awareness of phishing) remains important.
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