The UK Cyber Security and Resilience Bill: what to expect
The UK Cyber Security and Resilience Bill will significantly expand the scope and enforcement of cybersecurity regulation in the United Kingdom.
What is the UK Cyber Security and Resilience Bill?
The UK Cyber Security and Resilience Bill was introduced to UK Parliament on 12 November 2025. It significantly expands the scope of existing cybersecurity regulation, bringing new sectors and entity types into scope and introducing stronger enforcement mechanisms.
Who will the CSR Bill apply to?
The Bill expands the scope of UK cybersecurity regulation to cover a broader range of organisations and infrastructure.
- Operators of essential services across existing regulated sectors
- Data centres, standalone facilities of 1MW+ and enterprise facilities of 10MW+
- Managed service providers delivering IT and security services
- EV charging load controllers managing 300MW+ of capacity
- Critical suppliers designated by the Secretary of State
Key requirements
Incident reporting
Organisations must provide an initial incident report within 24 hours, followed by a full report within 72 hours of becoming aware of a significant incident.
Customer notification
Affected customers must be notified of incidents that could impact the services they receive.
Enhanced security measures
Organisations must implement strengthened technical and organisational security measures proportionate to the risks they face.
Supply chain management
Organisations must assess and manage cybersecurity risks across their supply chain and third-party relationships.
Cooperation with regulators
Organisations must cooperate with regulators including the National Cyber Security Centre (NCSC) during and after incidents.
Non-compliance consequences
- Serious breaches: up to £17 million or 4% of global turnover
- Less serious breaches: up to £10 million or 2% of global turnover
- Daily fines of up to £100,000 for non-compliance with national security directions
Ready for the CSR Bill, today
SIMSY provides the network-level capabilities that will be essential for CSR Bill compliance.
24-hour incident detection
Real-time monitoring with network-native telemetry enables detection and initial reporting within the 24-hour window.
Network resilience
Multi-network failover with automated carrier switching ensures service continuity during incidents.
Continuous monitoring evidence
Complete audit trail of all network events provides the evidence base regulators will expect.
Supply chain documentation
Transparent carrier relationships and full network path visibility support supply chain risk management.
Prepare for the CSR Bill
Talk to us about how SIMSY can help you get ready for the UK Cyber Security and Resilience Bill.