Question to the Department for Science, Innovation & Technology:

To ask the Secretary of State for Science, Innovation and Technology, what steps she is taking with Cabinet colleagues to protect the security of onshore telecommunication cables within Great Britain.

The Government is committed to ensuring the security and resilience of the UK’s telecommunications infrastructure.

As the lead government department for telecoms, DSIT is responsible for developing policies, including legislation, to help ensure the security of the UK’s public telecoms networks and services, and where appropriate works closely across government to ensure a coordinated approach. In doing so, it works closely with the National Cyber Security Centre (NCSC), as the UK’s lead technical authority for cyber security.

The Telecommunications (Security) Act 2021 sets out a robust telecoms security framework, requiring public telecoms providers to identify, reduce and prepare for the risk of security compromises to their networks and services. The government consulted on updating the associated Code in 2025.

Public telecoms providers are responsible for the cyber-security of their own networks, including onshore telecommunications cables, in line with their obligations under this framework. Ofcom, as the telecoms regulator, is responsible for monitoring and enforcing their compliance with those obligations.