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MNN UK · March 14, 2026 · 1 min read

UK and Ireland update defence pact to protect Irish waters and infrastructure

What happened: The UK and Ireland have signed a refreshed defence agreement that allows the Royal Navy to respond to threats in Irish waters, including hostile ships and cyber-attacks. The updated deal expands on a 2016 agreement to cover new risks such as sabotage of undersea internet and electricity cables.

Why it matters:

  • It enhances security for critical infrastructure passing through Irish waters, vital for transatlantic communications.
  • Both UK and Irish authorities gain clearer cooperation on maritime defence and cyber threat responses.

MNN Take: This agreement reflects growing concerns about protecting undersea cables and maritime security amid evolving threats. It formalises cooperation between the UK and Ireland to safeguard key infrastructure and respond to incidents in shared waters.

Sources: Guardian UK