CNI Supply Chains: What UK MSPs Need to Know | Assurix

UK MSPs serving regulated sectors are part of CNI supply chains. Here's what that means for compliance, the Cyber Security Bill, and how to prepare.

What is Critical National Infrastructure?

Critical National Infrastructure (CNI) covers the sectors that, if disrupted, would cause significant harm to the UK economy, public safety, or national security. This includes energy, water, transport, health, finance, and government.

Why MSPs are part of CNI supply chains

Many MSPs look after clients in sectors that are formally designated as CNI. If you manage IT for a GP surgery, a water utility sub-contractor, a local authority, or a financial services firm, you are part of that supply chain. You may not have been told, but the obligations that apply to your clients flow down to you.

What this means in practice

• MSPs in CNI supply chains are expected to meet higher security standards
• The Cyber Security and Resilience Bill will extend CNI obligations further into supply chains
• Your clients may require evidence of your security posture as a contractual condition
• NCSC CAF 4.0 provides the framework most CNI-adjacent organisations are measured against

What MSPs should do now

Identify which of your clients operate in regulated or CNI-adjacent sectors. Review the NCSC CAF 4.0 framework. Begin collecting continuous evidence of your security controls. Consider independent verification through the Assurix trustmark.

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