Key Highlights

  • Andy Burnham has retained Labour's Brexit red lines, ruling out a return to the EU customs union, single market and free movement.
  • The government's EU reset will continue through targeted cooperation rather than structural reintegration with the European Union.
  • A planned UK-EU summit was postponed following the change in leadership and is expected to be rescheduled later in the year.
  • Pro-European campaigners and business groups continue to call for closer economic integration ahead of the 2027 Trade and Cooperation Agreement review.
  • Labour maintains that targeted agreements, rather than customs union membership, remain the preferred approach to strengthening UK-EU relations.

Britain's relationship with the European Union remains one of the defining issues of post-Brexit politics. Yet despite a change of prime minister and renewed discussions over Britain's future relationship with Brussels, Labour has remained firm on one central policy: there will be no return to the customs union.

The position, established under Sir Keir Starmer and now maintained by Prime Minister Andy Burnham, has survived both a leadership transition and growing pressure from pro-European voices within and outside the Labour Party to pursue a more ambitious reset with the European Union.

Although Burnham has long been viewed as personally more sympathetic towards closer European cooperation, his government has chosen continuity over fundamental change.

A Line Drawn in Brussels, Held in Downing Street

The government's position was clearly outlined earlier this year by Nick Thomas-Symonds, the minister responsible for leading Labour's negotiations with the European Union.

Speaking in Brussels, he stated that Labour would not pursue a customs union with the EU and rejected suggestions of adopting alternative arrangements similar to those involving Turkey or Norway. He also reiterated that there was no intention of reopening the broader debate over EU membership.

While those commitments were originally made under Sir Keir Starmer, they have continued under Burnham's leadership.

Political analysts note that Labour's opposition to rejoining the customs union, the single market and free movement remains unchanged, reflecting commitments made during the party's general election campaign.

Burnham himself has adjusted his public messaging over time. Although he previously expressed support for Britain eventually rejoining the European Union, he has since clarified that such a proposal is not currently being pursued by his government.

Instead, observers increasingly describe his approach as one focused on gradual cooperation rather than major constitutional change.

Why the Red Line Matters

The customs union remains one of the most significant dividing lines in Britain's post-Brexit relationship with Europe.

Membership would reduce customs paperwork and many of the trade frictions experienced by exporters since the UK's departure from the European Union. However, it would also limit Britain's ability to negotiate independent trade agreements with countries outside the EU.

Successive governments have viewed an independent trade policy as a strategic priority, and Labour has chosen to maintain that position.

The government's approach instead focuses on expanding cooperation in specific sectors without reopening wider debates surrounding Brexit.

The UK-EU summit held in May 2025 established a framework for this strategy through agreements covering security, defence and broader strategic cooperation.

Negotiations have subsequently focused on three key areas:

  • A veterinary and sanitary agreement aimed at easing agricultural and food trade.
  • Greater cooperation between the UK and EU emissions trading systems.
  • A youth mobility arrangement designed to support educational and cultural exchanges.

These targeted agreements represent the practical foundation of Labour's EU reset while preserving its Brexit red lines.

A Summit Postponed, but Cooperation Continues

The transition in political leadership temporarily delayed the next stage of UK-EU engagement.

A second UK-EU summit, originally scheduled for 22 July 2026, was postponed following Sir Keir Starmer's resignation.

European officials subsequently indicated that the meeting would likely be rescheduled once the new government had settled into office, with expectations that discussions could resume later in the year.

Completing negotiations on veterinary cooperation, emissions trading and youth mobility now forms an important part of Burnham's European agenda.

The government's broader priorities continue to focus on practical cooperation in areas such as irregular migration, economic security and resilience rather than pursuing deeper institutional integration.

Risks, Pressures and the Case Against

Labour's position continues to attract criticism from several quarters.

Pro-European Labour MPs, the Liberal Democrats and London Mayor Sadiq Khan have all argued that Britain should seek closer economic integration with the European Union.

Business organisations are also expected to advocate stronger alignment during the scheduled review of the Trade and Cooperation Agreement in 2027, arguing that deeper access to European markets could provide greater long-term economic benefits.

Some independent analysts believe that targeted sectoral agreements alone may not be sufficient to overcome the economic challenges associated with remaining outside the single market and customs union.

However, Labour also faces significant political constraints.

Following disappointing local election results, the government remains cautious about reopening divisive Brexit debates. Reform UK, led by Nigel Farage, has continued to oppose any move perceived as weakening Britain's post-Brexit independence, creating additional political pressure for the government to maintain its current position.

Balancing economic cooperation with political stability therefore remains one of Burnham's principal challenges.

Outlook

Despite a change in political leadership, Labour's position on the customs union has remained remarkably consistent.

The Burnham government continues to favour targeted agreements with the European Union while ruling out membership of the customs union, the single market and the return of free movement.

Whether this position evolves during the 2027 review of the Trade and Cooperation Agreement remains uncertain. For now, however, the government's approach is clear: strengthen practical cooperation with Brussels while maintaining the Brexit framework on which Labour was elected.