We make the evidence-based case for the United Kingdom to rebuild its economic relationship with Europe through membership of the European Single Market — for prosperity, opportunity and connection.
To build public and political support for the United Kingdom rejoining the European Single Market.
Three terms sit at the heart of this debate, and they're often muddled. Here's what they actually mean — and why one of them is a club Britain built.
Launched on 1 January 1993, the Single Market treats its participating countries as one economic territory. Common and mutually recognised rules remove many national regulatory barriers, so products and services that meet the applicable requirements can circulate far more easily across all participating countries.
It rests on four freedoms: goods, services, capital and people move between member countries almost as easily as between counties of the UK. What sets it apart from an ordinary free trade deal is that it removes not just tariffs but the far bigger barriers behind the border — customs paperwork, duplicate testing, regulatory checks and restrictions on selling services.
The EEA, in force since 1994, is the agreement that extends the Single Market beyond the EU. Through it, Iceland, Liechtenstein and Norway take part in the market on near-equal terms — following its trade rules, contributing to its funds and enjoying its four freedoms — without being EU members.
EEA countries sit outside the EU's customs union, its agricultural and fisheries policies, its trade deals and its political union. In return they adopt the market's rules as they evolve — shaping them at an early stage through a formal consultation process, though without a final vote — and contribute to funds that reduce economic disparities across the area. It is a trade-off all three have judged worth keeping for over three decades. And it is why the "Norway model" features so often in debates about Britain's future: it is a proven institutional route into the Single Market from outside the EU — though one requiring two negotiated accessions: first to EFTA, then to the EEA Agreement.
EFTA is a four-nation free trade association — Iceland, Liechtenstein, Norway and Switzerland — that operates alongside the EU. All four of its members participate in the Single Market: three through the EEA, Switzerland through its bilateral treaties. Unlike the EU it is not a customs union, so members strike their own trade deals — and jointly, EFTA has built one of the world's largest free trade networks, with agreements spanning more than forty partners from Canada and South Korea to India and Mercosur.
And it is a British creation. The Stockholm Convention of 1960 was signed by the "Outer Seven" — the UK, Austria, Denmark, Norway, Portugal, Sweden and Switzerland — as Britain's answer to the six-nation common market it had declined to join. EFTA's first two secretaries-general were British. Britain left in 1973 to join the European Community, and over the years five of the seven founders followed the same path.
That history matters now, because EFTA is the standing doorway back to the Single Market: join EFTA, then join the EEA through it — the Norway route — though both steps are negotiated accessions requiring existing members' agreement, not an automatic entitlement. After the 2016 referendum, EFTA said it was open to a British return, with the Swiss president suggesting it would strengthen the association — though Norway has voiced honest reservations about how a country of 67 million would shift the balance of a 15-million-person club. Any return would be a negotiation, not a formality. But the door Britain built in 1960 is still on its hinges.
Know the difference
A political and economic union of 27 states, with a parliament, court and shared policies. The Single Market is its economic core — but the two are not the same thing.
Common rules letting goods, services, capital and people move far more freely across 30 countries. You can be in it without being in the EU.
A shared tariff wall: no duties between members, one common tariff around them. Turkey is in it without being in the Single Market; Norway is in the Single Market without being in it.
The treaty that plugs non-EU countries into the Single Market. Iceland, Liechtenstein and Norway use it today — and it's the route most often proposed for the UK.
A four-nation free trade club Britain co-founded in 1960 and left in 1973. It's the gateway through which non-EU countries reach the Single Market via the EEA.
The European Single Market connects hundreds of millions of consumers through common rules that reduce barriers to trade. For the UK, membership previously meant:
Easier exports and imports, with less paperwork and lower costs for businesses of every size.
Better access to European markets and the freedom to provide services across borders.
A more attractive destination for investment, supporting jobs and growth across the UK.
Easier recognition of professional qualifications for workers and businesses operating in Europe.
The ability for people to live, work and study across participating countries.
Single Market Matters believes these benefits are worth restoring — for businesses, workers and young people alike.
The Single Market formally comprises the 27 EU member states plus Iceland, Liechtenstein and Norway through the EEA — 30 countries in total, with Switzerland participating in substantial parts of it through bilateral agreements. Click any country to see where it stands — population, economy, and when it joined.
Hover for names — click or tap any country to see its relationship with the Single Market. The gold dots are microstates and small territories with arrangements of their own.
Six nations promise a common market with four freedoms. Britain stands aside.
The Stockholm Convention creates the "Outer Seven" free trade area, led by the UK.
President de Gaulle blocks Britain's applications to join the common market — twice.
The UK enters the European Communities alongside Ireland and Denmark.
Britain votes two-to-one to stay in.
Britain's commissioner lists some 300 barriers to sweep away — the Single Market blueprint.
On 1 January, goods, services, capital and people begin moving freely across the market.
The market extends beyond the EU to Iceland and Norway — Liechtenstein follows in 1995.
Britain votes 52–48 to leave the European Union.
The UK leaves the EU in January — and the Single Market at 11pm on 31 December.
The Trade and Cooperation Agreement takes effect: zero tariffs, but customs paperwork, checks and lost passporting.
Northern Ireland's dual access to the UK and EU goods markets is settled.
A UK–EU summit agrees a path to a food-standards deal and opens talks on youth mobility.
The question is no longer whether to rebuild the relationship, but how far. That's where this campaign comes in.
We support practical policies that help Britain reconnect economically with Europe.
UK membership of the European Single Market
Removing unnecessary trade barriers
Closer UK–EU economic cooperation
Stronger support for exporters and small businesses
Easier mobility for work, study and research through reciprocal agreements
Greater investment and economic growth
Evidence-based public debate about Britain's relationship with Europe
Five patterns, drawn from the documented experience of British firms and workers since 2021.
Shellfish and salmon that once reached Paris restaurants overnight now need export health certificates, vet sign-off and border inspection. Hours matter with fresh produce — some exporters gave up on the EU entirely; others opened EU depots, moving jobs with them.
A European tour was once one itinerary. Now it's a country-by-country puzzle of work permits and instrument carnets, while the trucks that carry the stage are limited to three stops in the EU before they must return home. Smaller acts simply tour less.
Free movement let researchers take posts across 30 countries without visas, and EU programmes funded the labs. The UK spent three years locked out of Horizon Europe before rejoining as an associate in 2024 — but hiring European talent now means sponsorship, fees and waiting.
A parts maker that sold to Germany like it sold to Birmingham now files customs declarations and rules-of-origin evidence on every consignment. Some EU customers switched to suppliers inside the market rather than carry the paperwork — orders lost not on quality or price, but on friction.
Hauliers who crossed the Channel like a county line now manage border queues, transit documents and customs agents — and the three-stop cabotage limit cut what a British truck can do inside the EU. Costs rose, and those costs land in everyone's prices.
None of this came from tariffs — the trade deal removed those. It came from losing the Single Market itself: the shared rulebook that made borders irrelevant. That's why the market, not just "a deal", is what this campaign is about.
Single Market Matters is politically independent and not affiliated with any political party. Our supporters come from a wide range of political backgrounds but share one belief: Britain's economic future is stronger with closer access to the European Single Market.
There is more than one door. Each route has different requirements and trade-offs — we set them out plainly so the debate can be an informed one.
Rejoin the association Britain founded, then enter the Single Market through the EEA Agreement — the proven institutional route used by Norway, Iceland and Liechtenstein for three decades — requiring two negotiated accessions: first to EFTA, then to the EEA Agreement.
Trade-offs: broad market access across the four freedoms (agriculture and fisheries excluded); outside the customs union, farming and fisheries policies; adopts market rules with early input but no final vote; requires the consent of existing EFTA members.
Negotiate access sector by sector, as Switzerland has since the 1990s — a bespoke patchwork covering goods and movement but, notably, not services in general.
Trade-offs: maximum flexibility on paper; decades to build; the EU has spent twenty years saying it won't repeat the model, and pressed Switzerland into a new framework in 2024.
Build outward from the existing trade deal: a food-standards agreement, mobility schemes, mutual recognition — the direction of travel since the 2025 summit.
Trade-offs: politically easiest, available now; each step removes some friction, but stops short of the four freedoms — services and free movement stay out unless negotiated in.
Complete restoration: Single Market, customs union, and a vote on the rules through the parliament and council.
Trade-offs: the only route restoring a formal vote in EU lawmaking — EEA states shape proposals at an early stage but do not vote on their final adoption; also the longest political road, requiring accession negotiations and unanimous agreement of 27 member states.
Publish clear research explaining how the Single Market works and what its economic effects are.
Help people understand the practical differences between the EU, the Single Market, the Customs Union and other forms of cooperation.
Promote practical proposals that improve Britain's economic relationship with Europe.
Work with businesses, academics, trade organisations, campaign groups and politicians to encourage evidence-based policy.
Not necessarily. The Single Market and European Union are closely connected, but they are not identical. Some European countries participate in the Single Market without being EU member states, through separate agreements.
Because it has a direct impact on jobs, trade, investment, productivity and economic growth.
No. We are an independent campaign organisation.
A Britain that is prosperous, outward-looking, competitive and closely connected with its European neighbours.
Cash trade figures keep rising with inflation and growth, so they hide the real story. The honest question is the counterfactual: how has the UK done compared with where it would otherwise have been — and compared with similar economies? These charts show the estimates from official and widely cited research.
The Office for Budget Responsibility's central assumptions, compared with remaining in the EU. The productivity effect is assumed to build over roughly 15 years.
Estimated effects relative to where the economy might otherwise have been — not literal falls since 2016. Darker bars show the lower estimate; lighter extensions the upper.
Goods trade volumes, indexed to 2019 = 100. UK figures are for the end of 2023; rest-of-G7 comparisons use the latest 2023 observations cited by the OBR.
Percentage change in trade intensity since 2019. Trade intensity means exports plus imports as a share of GDP.
Growth in current prices, 2019–2022 — not inflation-adjusted. Figures are approximate published values and labelled as such.
Change in trade volumes since 2019. UK figures are for the end of 2023; rest-of-G7 figures are the latest 2023 observations cited by the OBR. UK services kept pace — UK goods went the other way.
Scale figures: European Commission · formal 30-country definition: Council of the EU infographic. Switzerland participates in substantial parts of the market through bilateral agreements but is not part of the formal 30-country total. All impact figures above are estimates or modelled counterfactuals, clearly distinct from direct observations.
The key figures on this site, each linked to the source document it comes from — with a tag showing whether it's an official statistic, a forecast assumption, or a research estimate.
A full evidence centre — complete citations, methodologies, trade statistics and downloadable briefings — is in development and will live here. Where a figure cannot yet be traced to a specific document, we remove it rather than publish it.
Whether you are a student, business owner, exporter, worker or simply interested in Britain's future, there is a place for you in our campaign.
Britain's relationship with Europe is one of the defining issues of our generation. Single Market Matters exists to make the case for a closer economic partnership built on facts, evidence and opportunity.