Northern Ireland 2026 – Windsor Framework: What It Means for Polish Exporters

Why is Northern Ireland unique after Brexit?

When the United Kingdom left the European Union on 1 January 2021, Northern Ireland found itself in a unique geopolitical position. As part of the UK it formally left the EU, but because of the land border with the Republic of Ireland (an EU member state) it was not possible to introduce a hard customs border on the island of Ireland — doing so would threaten the 1998 Good Friday Agreement.

The solution was first the Northern Ireland Protocol, and then the Windsor Framework negotiated in 2023. In practice this means Northern Ireland:

• remains formally part of the UK customs territory,
• but applies EU rules on goods (including SPS standards),
• has access to the EU single market without customs barriers,
• and simultaneously benefits from trade agreements that the UK has concluded with third countries.

This is the so-called dual market access: goods produced or processed in Northern Ireland can be sold in both the UK and EU markets — without tariffs and without the need to meet additional import requirements on either side.

The Windsor Framework — key principles

The Windsor Framework (agreed on 27 February 2023 by the UK Government and the European Commission) replaced the Northern Ireland Protocol. Its main principles are:

1. UK Internal Market Scheme (UKIMS) — UKIMS-authorised businesses can declare goods moving from Great Britain (GB) to Northern Ireland as "not at risk" of entering the EU. Since 1 May 2025 GOV.UK uses this terminology; in 2023 these routes were called the "green lane" and "red lane".
2. No EU duty on "not at risk" goods moved from GB to Northern Ireland by UKIMS-authorised businesses.
3. SPS easements for retail goods moved from GB (NI Retail Movement Scheme).
4. The Stormont Brake — the Northern Ireland Assembly can trigger an objection procedure to changes in EU rules applying in Northern Ireland.

"Not at risk" and "at risk" goods (UKIMS) — for movements from GB

This decision matters only when goods enter Northern Ireland from Great Britain (GB), e.g. from a warehouse in England. For a direct shipment from Poland (without crossing GB) this distinction does not apply.

Shipping from Poland to Northern Ireland — step by step

For a Polish business shipping goods to Belfast, Derry or Newry, the procedure is as follows:

Step 1: Commercial documents and VAT (no customs declaration)

When goods are shipped directly from the EU to Northern Ireland, no export declaration is lodged — the goods remain in intra-EU trade. You need an invoice, a transport document (CMR) and — for VAT — the customer's VAT number with the XI prefix, which allows the sale to be treated as an intra-Community supply of goods.

Step 2: Choosing the route

A direct route, e.g. by sea to ports in Ireland (Dublin, Rosslare) and then by road, avoids GB territory and requires no customs formalities. If the goods travel through Great Britain (e.g. Calais–Dover, then Holyhead or Cairnryan), they temporarily leave the EU customs territory — a transit procedure (NCTS) and safety and security declarations (ENS) are then needed for the journey through GB.

Step 3: Entry into Northern Ireland

Goods from Poland/the EU enter Northern Ireland as intra-EU trade — without an import declaration and without the "not at risk" / "at risk" distinction. That distinction applies only to goods entering Northern Ireland from Great Britain (GB).

UKIMS — what is it and who can use it?

The UK Internal Market Scheme (UKIMS) is an HMRC authorisation that allows goods moved from GB to Northern Ireland to be declared "not at risk". Applicants include:

• businesses operating in Northern Ireland,
• businesses outside Northern Ireland moving goods from GB to Northern Ireland for end consumers there,
• traders holding an EORI number with the XI prefix.

UKIMS concerns GB → Northern Ireland movements. A Polish business shipping directly from the EU to Northern Ireland does not need UKIMS — the topic only concerns goods coming from Great Britain. Details are worth confirming with HMRC, or contact us.

Dual market access — a benefit for Polish businesses

Northern Ireland offers Polish businesses a unique opportunity that no other territory outside the EU provides:

• Goods produced in Northern Ireland can be sold on the EU market without duty and without an EU import declaration.
• Qualifying Northern Ireland goods have unfettered access to the Great Britain market.
• For Polish companies with production or warehousing operations in Northern Ireland, this means serving both the UK and EU markets from one location.

Goods subject to special rules

Not all goods are treated the same way. Special rules apply to:

Food and agricultural products (SPS)

EU sanitary and phytosanitary rules apply in Northern Ireland. Direct shipments from the EU follow intra-EU trade rules. Checks at Border Control Posts (BCP) in Belfast and Larne concern SPS goods arriving from GB or from outside the EU; for retail goods from GB the NI Retail Movement Scheme applies.

Medicines and medical devices

A special regime applies — Northern Ireland follows some EU rules on medicines and medical devices, while the rest of the UK follows MHRA rules. Check the current requirements for the specific product before shipping.

Vehicles and automotive parts

EU product rules apply in Northern Ireland. For movements from GB, parts may be declared "not at risk" if the UKIMS conditions are met. If you also sell in GB, British requirements must be taken into account.

Practical documents for PL → Northern Ireland shipments

How much does shipping to Northern Ireland cost?

A direct shipment from Poland to Northern Ireland involves no customs declaration, so there is no export or import clearance fee. Customs costs arise only for routes through Great Britain (transit, ENS) or for movements from GB to Northern Ireland. Current rates are on our pricing page.

For "not at risk" goods (UKIMS) the recipient in Northern Ireland pays no duty. For "at risk" goods EU tariff duty applies, with the option to claim a reimbursement if the goods do not enter the EU.

Common mistakes

1. Lodging an export declaration for a PL → Northern Ireland shipment — not needed on a direct route; this is intra-EU trade.
2. Ignoring SPS rules — food products without the required documents may be held.
3. Confusing a route through GB with a direct route — crossing Great Britain requires transit and ENS, which adds cost and time.
4. Customer has no XI VAT number — makes it harder to treat the sale as an intra-Community supply.

Related articles

• EUR.1 Certificate — when is it required for UK exports?
• ENS Declaration UK — what it is and who submits it