At the second UK–Ireland Summit in Cork on Friday 13 March 2026, the Prime Minister confirmed £937 million in new Irish investment into the UK, expected to create around 850 jobs. Government said fifteen firms spanning AI, renewables and telecoms will expand across London, Doncaster, South Wales and Scotland. Downing Street presented the commitments as a signal of confidence in the UK’s Modern Industrial Strategy. (gov.uk)
Bilateral security cooperation has been updated through a refreshed UK–Ireland Defence Memorandum of Understanding. The revision prioritises maritime and cyber cooperation, improves information‑sharing and planning, and provides for joint procurement initiatives. Ministers highlighted the need to deter hostile state activity and disrupt so‑called shadow‑fleet operations in the Irish and Celtic Seas. (gov.uk)
Both governments also committed to strengthen the resilience of subsea fibre‑optic cables linking the two countries, including running joint exercises to test responses to a major cable incident. In the UK, a new cross‑government coordination mechanism on subsea telecommunications has been established following recommendations by Parliament’s Joint Committee on the National Security Strategy. (gov.uk)
Leaders welcomed progress towards completing two electricity interconnectors. One project will connect Wales and Ireland, with capacity equivalent to supplying around 570,000 homes and at least £740 million of private investment; a separate connector between Northern Ireland and Ireland is intended to reduce electricity costs on both sides of the border. (gov.uk)
Officials framed the interconnectors as measures that strengthen security of supply and can, over time, support lower prices by allowing the export of surplus low‑carbon generation and imports during tighter periods. The projects were presented as long‑term system resilience investments rather than one‑off interventions. (gov.uk)
The investment package announced alongside the summit spans corporate services, software, energy and infrastructure. Examples include a £25 million, 200‑kilometre fibre link in West Wales to Newport by Step Telecoms; £170 million by Gas Networks Ireland to decarbonise two compressor stations in Scotland; a Manchester student accommodation scheme by O’Flynn Group; and an AI and cloud expansion by Amach expected to add 150 skilled roles. (gov.uk)
Enterprise Ireland’s 2026 UK Market Sentiment Survey, published on 9 March, reports that 64% of surveyed Irish companies have a physical UK presence, 60% plan to increase UK investment over the next 12 months and 67% expect to grow their UK workforce. The Taoiseach welcomed the findings as evidence of a deepening commercial relationship. (enterprise-ireland.com)
The Cork meeting follows the inaugural UK–Ireland Summit in March 2025, where leaders set out a UK–Ireland 2030 programme of cooperation that included closer working on maritime security and critical undersea infrastructure. The refreshed defence MoU is presented as part of delivering on that agenda. (gov.ie)
Policy signals also align with Ireland’s recent endorsement of the New York Joint Statement on the Security and Resilience of Undersea Cables and ongoing EU work to strengthen cable security and incident response. These frameworks provide additional channels for technical collaboration alongside the bilateral commitments. (gov.ie)
For departments and agencies, implementation now moves to operational coordination between the UK Ministry of Defence and Ireland’s Department of Defence, with inputs from relevant digital and energy authorities on cable resilience and grid projects. For businesses, the £937 million pipeline underscores sustained Irish appetite for UK expansion, with potential opportunities tied to interconnection, data infrastructure and procurement arising from the revised MoU. (gov.uk)