Brexit resurfaces as Labour leadership contenders stake competing claims

Brexit has re-emerged as a focal point of Labour Party politics as senior figures vie for prominence in a possible party leadership race, rekindling arguments over the Britain’s ties with the European Union. Former Health Secretary Wes Streeting stated at the Progress Conference in London on Saturday that departing the European Union was “a catastrophic mistake”, whilst concurrently disclosing his bid to challenge Sir Keir Starmer for the party leader position. The remarks have thrust the disputed question back into the public eye at a time when the party has generally tried to evade rehashing the contentious debate, with other leadership contenders now forced to clarify their own views regarding whether Britain should one day rejoin the bloc.

Streeting’s strong EU stance revives party divisions

Wes Streeting’s assertion that Brexit was a “catastrophic mistake” represents a significant departure from the measured approach adopted by Sir Keir Starmer’s administration. Addressing the Progress Conference, the ex Health Secretary contended that Labour had struggled with “overcautiousness” in opposition, being “too afraid of what the Tories might say” about divisive policy matters. He contended that the party should address “the big issues that define our age”, with Brexit heading his set of three crucial national issues requiring fresh debate and decision-making.

Streeting’s intervention has immediately revealed fault lines across Labour’s senior ranks. His statement that Britain’s future “rests” with Europe – and eventually returning to the European Union” openly contradicts the party’s current strategy of upholding strict “core boundaries” preventing rejoining the common market or customs union. However, he was careful to note that any return to European Union membership would necessitate a new popular mandate. The comments have placed various possible leadership contenders, such as Greater Manchester mayor Andy Burnham, in an uncomfortable position of being forced to openly explain their own positions on relations with Europe.

• Streeting contends Brexit has rendered Britain less wealthy and powerful since the Industrial Revolution
• Labour leadership has previously avoided relitigating the divisive EU membership question
• Streeting highlights any EU rejoin would necessitate a new electoral mandate first
• Conservative Party Chairman Kevin Hollinrake accused Labour of distraction from living costs

The Makerfield constituency contest transforms into a battleground over Brexit

The upcoming by-election in Makerfield, scheduled for 18 June, is rapidly emerging as a proxy battleground for competing visions on Britain’s relationship with the EU. Andy Burnham, the Greater Manchester mayor seeking the Labour candidacy, has found himself caught between the party’s official cautious position and the more forthright positions being staked out by aspiring leaders. When questioned by ITV News on whether he supports EU rejoin, Burnham conceded that “in the longer term there is a case for that” but insisted he is “not advocating that in this by-election”, reflecting the delicate political tightrope the party must navigate.

Burnham’s ambiguity underscores the campaign sensitivity concerning Brexit in local areas like Makerfield, where the Leave vote stays considerable. Should he win both the Labour candidacy and capture the seat, he would be placed to mount a challenge to the leadership against Sir Keir Starmer. However, his meticulously balanced remarks reveal the conflict between recognising Brexit’s economic costs and honouring the democratic mandate shown in the 2016 referendum—a tension that will likely characterise Labour’s internal debate on leadership.

Reform Party capitalises on Leave sentiment

Reform UK has recognised Makerfield as fertile ground for activating Leave voters dissatisfied with Labour’s ambiguous positioning on EU relations. The party has pointed out that 65 per cent of the constituency supported Brexit in the 2016 referendum, a significant lead that indicates substantial potential for candidates ready to defend the Leave decision. By contrast, Labour’s unwillingness to strongly support Brexit or articulate a clear vision for Britain after Europe leaves an opening for populist challengers to capitalise on.

The appearance of Brexit as a campaign issue in Makerfield demonstrates broader political positioning by Reform UK to establish itself as the genuine representative of Leave voters. As Labour prospective leaders discuss the party’s long-term ties with Europe, Reform UK’s willingness to champion Brexit defence presents a distinct alternative narrative. This development may complicate Labour’s attempts to hold the seat whilst at the same time handling internal divisions over the party’s sustained approach to Europe.

Burnham approaches the European Union issue with caution

Andy Burnham’s reply to questions about EU rejoin exposes the precarious situation confronting Labour’s prospective leadership candidates. The Greater Manchester civic leader, who is running to become Labour’s candidate in the Makerfield contest scheduled for 18 June, conceded that “in the long-term there is a case for that” when asked about returning to the European Union. Yet he quickly tempered this by stating he is “not advocating that in this by-election”, reflecting the party’s broader reluctance to commit openly to a pro-EU position that might estrange Leave-voting constituencies.

Burnham’s measured approach mirrors his previous remarks made publicly regarding the 2016 referendum outcome, insisting that any shift toward EU rejoin would necessitate a renewed democratic mandate obtained via a general election. This careful approach allows him to demonstrate receptiveness to closer EU relations amongst reform-minded Labour figures whilst at the same time reassuring Leave voters in established party heartlands. The delicate balance highlights the political challenge Labour must handle as it contends with its identity following Brexit and strategic direction under new leadership.

• Burnham acknowledges long-term case for EU rejoin but sidesteps current advocacy
• Any EU rejoin would require fresh electoral mandate from UK voters
• Strategic positioning aims to satisfy both reform-minded and pro-Leave Labour members

Conservative and Labour parties seize the moment

The Conservative Party has moved quickly to weaponise Streeting’s Brexit comments, with Party Chairman Kevin Hollinrake condemning Labour’s willingness to relitigate the EU question as a damaging distraction. Hollinrake contended that whilst Labour leadership contenders discuss European policy, the government continues unable to focus on the urgent issues of British families and businesses, particularly the rising cost of living and financial security. This counterattack demonstrates the Tories’ wider approach of depicting Labour as obsessed with reversing Brexit rather than tackling pressing domestic issues. The intervention highlights how profoundly Brexit remains embedded in British political debate, able to rekindle partisan divisions at critical junctures.

Reform UK, in the meantime, has identified Makerfield as fertile ground to strengthen its pro-Brexit credentials and appeal to voters who feel let down. The party has highlighted that 65 per cent of constituents voted Leave in the 2016 referendum, establishing itself as the authentic guardian of that mandate. By comparing its clear support of Brexit with Labour’s perceived ambivalence and the Conservatives’ difficulties in delivering, Reform UK aims to consolidate those who voted Leave under its banner. This three-party competition demonstrates how the question of Britain’s relationship with the EU continues to fracture traditional party loyalties and reshape electoral calculations across British politics.

What the revival signifies for Labour’s strategic path

The rise of Brexit as a key focal point in Labour’s leadership contest indicates a fundamental reckoning within the party over its strategic approach and ideological positioning. Streeting’s willingness to articulate what many in the party have privately believed—that EU departure was economically harmful—represents a challenge against the careful consensus Sir Keir Starmer has upheld since taking the leadership. This fracture implies Labour’s future leader may come under pressure to adopt a more forthright stance on European engagement, potentially reshaping the party’s attraction for Remain-voting constituencies and younger voters who view Brexit as a defining policy failure.

However, the party faces a tricky juggling act. Labour’s core working-class constituencies, exemplified by constituencies like Makerfield where 65 per cent backed Leave, stay deeply doubtful of any call to reverse the referendum result. Candidates like Andy Burnham must manage this tension carefully, accepting potential pathways whilst steering clear of alienating Leave voters in important by-elections. The consequences of these rival leadership approaches will probably decide whether Labour seeks to bridge the Brexit divide or treats it as a permanent feature of British politics, with profound consequences for the party’s electoral standing and governing agenda.