Windsor Framework Reshapes North-South Trade as Cross-Border Commerce Hits Record Levels
New research from the Economic and Social Research Institute has found that the Windsor Framework has significantly boosted trade between Northern Ireland and the Republic of Ireland, with cross-border commerce growing at twice the rate predicted by economic models and services exports expanding at double the pace of goods trade, in findings that have significant implications for the economic case for Irish unity.
Background
The Windsor Framework, agreed between the UK and EU in February 2023, replaced the Northern Ireland Protocol and established a new set of arrangements governing the movement of goods between Great Britain and Northern Ireland. The framework created a "green lane" for goods moving from Great Britain to Northern Ireland that are destined to remain in Northern Ireland, and a "red lane" for goods that might enter the EU single market through the Republic of Ireland.
The framework also maintained Northern Ireland's access to the EU single market for goods, a provision that has had significant implications for North-South trade. Businesses in Northern Ireland can sell goods into the Republic — and by extension the wider EU — without the tariffs and regulatory barriers that apply to goods moving from Great Britain to the EU. This has created a competitive advantage for Northern Ireland-based manufacturers and distributors that was not anticipated in the original economic modelling of the Protocol's effects.
Key Developments
The ESRI research, published on Thursday, analysed trade data from 2023 to the first quarter of 2026 and found that North-South trade in goods had grown by 34 per cent over the period — significantly above the 18 per cent growth predicted by the institute's baseline model. Services trade, which includes financial services, professional services, and digital services, grew by 67 per cent over the same period, more than double the modelled rate.
The research identified several drivers of the stronger-than-expected growth. First, the green lane arrangements have proved more efficient in practice than anticipated, with average processing times for goods moving from Great Britain to Northern Ireland falling from 4.2 hours under the Protocol to 1.8 hours under the Windsor Framework. This has made Northern Ireland a more attractive location for distribution centres serving both the UK and Irish markets.
Second, the framework's provisions for Northern Ireland's participation in EU regulatory processes — including the right to be consulted on new EU regulations affecting goods — have given Northern Ireland businesses greater certainty about the regulatory environment, encouraging investment in production capacity. Third, the growth in services trade reflects the increasing integration of the two economies' professional services sectors, driven partly by the expansion of remote working and partly by deliberate cross-border business development strategies.
ESRI research director Kieran McQuinn said the findings suggested that "the economic benefits of the Windsor Framework are substantially larger than we initially projected" and that the framework had "created a new economic geography for the island of Ireland that is distinct from both the UK and EU models." He said the research had implications for how policymakers in both Dublin and London thought about the economic dimensions of the Northern Ireland question.
Why It Matters
The ESRI findings are significant for several reasons. They suggest that the Windsor Framework has been more economically beneficial for Northern Ireland than its critics — primarily within unionism — predicted. The DUP's opposition to the Protocol and its successor was based partly on the argument that the arrangements would damage Northern Ireland's economic integration with Great Britain. The ESRI data suggests that while some trade diversion has occurred, it has been more than offset by the growth in North-South and Northern Ireland-EU trade.
The findings also have implications for the debate about Irish unity. One of the central arguments made by unity advocates is that a united Ireland would create a larger, more integrated economic space that would benefit both jurisdictions. The ESRI research suggests that economic integration is already advancing rapidly under the current constitutional arrangements, which complicates both the case for and against unity on purely economic grounds.
For businesses on both sides of the border, the research confirms what many have experienced in practice: that the Windsor Framework has created new commercial opportunities that did not exist before Brexit. The growth in services trade is particularly significant because it is less visible than goods trade but potentially more durable.
Local Impact
The economic benefits of the Windsor Framework are most visible in the border counties, where cross-border business activity has intensified significantly. In Newry, which straddles the border between County Down and County Armagh, the city's retail and distribution sector has expanded by an estimated 18 per cent since the Windsor Framework came into effect, with several new logistics facilities opening on the outskirts of the city. In Dundalk, County Louth, the town's position as a gateway between the two economies has attracted new investment in food processing and professional services. In Derry and Strabane, the cross-border economic partnership has reported record levels of joint business development activity, with 47 new cross-border business partnerships established in the first quarter of 2026 alone.
What's Next
The ESRI will publish a full report on the Windsor Framework's economic effects in September, which will include projections for trade growth over the next five years. The report will be presented to the North South Ministerial Council at its autumn plenary meeting. The British and Irish governments have both said they will use the research to inform their approach to the next review of the Windsor Framework, which is scheduled for 2027. Business groups on both sides of the border have called for the review to focus on further reducing friction in the green lane and extending the framework's provisions to cover services trade more explicitly.
