The Foreign Policy and National Security Secretariat (FPNSS) within the Cabinet Office works with responsible departments across Whitehall to coordinate policy on the resilience of subsea and offshore infrastructure. This policy coordination role compliments broader horizon scanning efforts within the department which aim to identify potential risks to infrastructure through early warning mechanisms or relevant intelligence.

Where crises impacting this infrastructure do materialise and could harm the UK’s national security, the Cabinet Office's National Security Watchkeepers, a team responsible for monitoring open source and government reporting tools on a 24/7 basis, alert the relevant teams within government.

Following any crisis notification, it is up to the relevant policy team in the FPNSS to work with the lead government department to assess the level of risk, identify any impacts and outline the appropriate next steps which HMG needs to take, including the activation of crisis machinery within the Cabinet Office where required.

The Government takes the protection and resilience of subsea and offshore infrastructure seriously and departments work together to protect it from malicious and other hazards such as accidental damage. The Cabinet Office is responsible for coordinating interdepartmental efforts. The Department for Business, Energy and Industrial Strategy is the lead department for the energy sector, including subsea energy CrNI. The Department for Digital, Culture, Media and Sport is the lead department for telecommunications policy, including telecommunications subsea cables. The Ministry of Defence is responsible for defending UK interests within the UK Marine Area (UK Territorial Waters and Exclusive Economic Zones) and forms part of HMG’s efforts to counter state threats.