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Starmer has abandoned or watered down many Corbyn-era policies:

• Dropped: Nationalisation of energy, abolition of tuition fees, £15 minimum wage
• Kept (in modified form): Public ownership of rail (but only as contracts expire), workers' rights, green investment (reduced from £28bn to £4.7bn per year)
• New priorities: Fiscal discipline, pro-business messaging, "tough on crime" rhetoric

Electoral success

Starmer's strategy delivered a landslide victory in the July 2024 general election:

• Labour: 411 seats (up 211), 33.7% of the vote
• Conservatives: 121 seats (down 251), 23.7% of the vote

However, Labour's vote share was lower than Corbyn's 40% in 2017, and the victory was largely due to Conservative collapse and tactical voting rather than enthusiasm for Starmer.

Key Factional Flashpoints

Certain issues consistently divide Labour's factions:

1. Israel-Palestine

• Left position: Support for Palestinian self-determination, end to occupation, criticism of Israeli government actions, support for BDS (Boycott, Divestment, Sanctions)
• Right position: Support for Israel's right to exist and defend itself, opposition to BDS, criticism of Hamas
• Starmer's position: Strong support for Israel, described himself as a "Zionist" in 2021, faced backlash from left and Muslim communities for initial response to Gaza war in 2023

2. NATO and foreign policy

• Left position: Sceptical of NATO expansion, opposed to nuclear weapons (Trident), anti-interventionist, critical of US foreign policy
• Right position: Strong NATO support, pro-Trident, interventionist (supported Iraq War, Libya intervention)
• Starmer's position: Pro-NATO, committed to Trident, supported Ukraine against Russia, more Atlanticist than Corbyn

3. Economic policy

• Left position: Nationalisation, wealth taxes, higher public spending, challenge to neoliberalism
• Right position: Fiscal discipline, pro-business, private sector partnerships, acceptance of market economics
• Starmer's position: Cautious, emphasises "fiscal responsibility," dropped £28bn green pledge, pro-business but supports some redistribution

4. Party democracy

• Left position: Mandatory reselection of MPs, more power to members, open candidate selection
• Right position: MPs should have autonomy, leadership should control candidate selection, members should not override parliamentary party
• Starmer's position: Centralised control, NEC vetting of candidates, higher thresholds for leadership challenges

The Membership: Who Are Labour's Members?

Labour's membership has fluctuated dramatically:

• 2015: 190,000 (pre-Corbyn)
• 2017: 580,000 (peak Corbyn era)
• 2020: 523,000 (Starmer elected)
• 2024: Estimated 370,000-400,000 (significant decline under Starmer)

Demographics and ideology

Academic research (including studies by Queen Mary University of London and the Mile End Institute) shows Labour members are:

• Younger than Conservative members (average age 53 vs 57)
• More diverse: Around 15% non-white (vs 3% of Conservative members)
• More left-wing than Labour voters and MPs, especially on economics and foreign policy
• More educated: Over 60% have university degrees
• Urban: Concentrated in London and other cities

Factional breakdown (estimated)

• Socialist left: 30-35% (down from 50%+ under Corbyn)
• Soft left: 40-45% (Starmer's base)
• Centre-right: 15-20%
• Unaligned: 10-15%

The Future: Can Labour's Factions Coexist?

Labour's factional divisions are unlikely to disappear:

Scenarios for the next decade

1. Starmer consolidation: If Starmer governs successfully, the soft left will dominate and the hard left will remain marginalised, similar to the New Labour era
2. Left resurgence: If Starmer's government fails or betrays manifesto pledges, the left could regain influence through grassroots organising and leadership challenges
3. Split: If tensions become unbearable, the left could split to form a new party (as the SDP did in 1981), though this is unlikely given the electoral system punishes small parties
4. Managed pluralism: Labour could adopt a more pluralist approach, tolerating factional diversity as long as it doesn't undermine electoral success

The role of unions

Trade unions remain Labour's largest funders and have significant influence through the NEC and conference. Unions are divided:

• Left-leaning unions: Unite, FBU (Fire Brigades Union), RMT (though RMT disaffiliated in 2004 and has not rejoined)
• Centre-left unions: Unison, GMB, USDAW
• Starmer's coalition: Starmer has cultivated support from GMB and Unison, balancing union influence with leadership control

The Bottom Line

Labour's main factions are the socialist left (Corbynites, Socialist Campaign Group), soft left (Starmer's base), and centre-right (Blairites, Progress group). Factional battles have shaped Labour's direction since the 1980s, from Militant expulsions to the Corbyn surge and Starmer's reassertion of control. The 2015-2020 Corbyn era saw the left take control of the party for the first time in decades, winning two leadership elections with overwhelming member support, but the 2019 election collapse and antisemitism crisis weakened the left's position.

Keir Starmer's leadership (2020-present) has marginalised the left through rule changes, candidate selections, and the removal of the whip from Jeremy Corbyn. Starmer's strategy delivered a landslide election victory in July 2024, but his government faces pressure from both the left (demanding more radical policies) and the right (demanding fiscal discipline and pro-business policies).

Labour's factional divisions reflect deeper ideological splits over capitalism, foreign policy, Israel-Palestine, and whether Labour should transform or manage the economy. These divisions are unlikely to disappear, and the next decade will determine whether Labour can govern as a broad coalition or whether factional warfare will resume once the honeymoon of electoral victory fades.

Key takeaways

• Labour's main factions are the socialist left (Corbynites, Socialist Campaign Group), soft left (Starmer's base), and centre-right (Blairites, Progress group)
• Factional battles have shaped Labour's direction since the 1980s, from Militant expulsions to the Corbyn surge and Starmer's reassertion of control
• The 2015-2020 Corbyn era saw the left take control of the party for the first time in decades, winning two leadership elections with overwhelming member support
• Keir Starmer's leadership (2020-present) has marginalised the left through rule changes, candidate selections, and the removal of the whip from Jeremy Corbyn
• Labour's factional divisions reflect deeper ideological splits over capitalism, foreign policy, Israel-Palestine, and whether Labour should transform or manage the economy

Sources

• LabourList - Labour Party news and factional analysis
• The Guardian - Labour Party politics coverage
• New Statesman - Labour factions and ideology
• Tribune Magazine - Socialist perspective on Labour

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