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The Liberal Democrats and the Coalition: How Five Years in Government Nearly Destroyed the Party

Politics · September 17, 2025 · Sarah Mitchell · 9 min

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The 2010-2015 Conservative-Liberal Democrat coalition gave the Lib Dems their first taste of power in 70 years—and nearly destroyed them. From 57 seats to 8, the tuition fees betrayal to the Alternative Vote referendum defeat, here's how the coalition reshaped British politics.

The 2010-2015 Conservative-Liberal Democrat coalition was a political earthquake that reshaped British politics—and nearly destroyed the Liberal Democrats in the process. For the Lib Dems, it was their first taste of national power since the wartime coalition of the 1940s, a chance to prove they were more than a protest party. For the country, it was the first peacetime coalition government since the 1930s, a five-year experiment in compromise and shared power. But for the Liberal Democrats, the coalition became a catastrophe. The tuition fees betrayal, the Alternative Vote referendum defeat, and the austerity policies they enabled led to a 2015 electoral wipeout that reduced them from 57 seats to just 8. Here's how the coalition happened, what the Lib Dems achieved, why it went so wrong, and whether they have recovered.

The 2010 Election: Hung Parliament and Coalition Negotiations

The 2010 general election produced the UK's first hung parliament since February 1974:

Election results (6 May 2010)

• Conservatives: 306 seats (36.1% vote share) — largest party but short of the 326 needed for a majority
• Labour: 258 seats (29.0%) — lost 91 seats after 13 years in power under Tony Blair and Gordon Brown
• Liberal Democrats: 57 seats (23.0%) — lost 5 seats despite a surge in support during the campaign (the "Cleggmania" effect after strong TV debate performances)

The coalition negotiations (7-11 May 2010)

With no party having a majority, the Liberal Democrats held the balance of power. Nick Clegg, the Lib Dem leader, faced a choice:

1. Coalition with Conservatives: Would give a stable majority (363 seats) but require compromising on Lib Dem policies
2. Coalition with Labour: Would require support from smaller parties (SNP, Plaid Cymru, SDLP, Green) and still fall short of a majority (315 seats)
3. Confidence and supply: Support a minority Conservative government on key votes without joining the cabinet

After five days of negotiations, the Lib Dems chose a full coalition with the Conservatives, announced on 11 May 2010. The deal included:

• Cabinet positions: 5 Lib Dem cabinet ministers (including Nick Clegg as Deputy PM and Vince Cable as Business Secretary)
• Policy concessions: Referendum on Alternative Vote (AV) electoral reform, raising income tax threshold, pupil premium, green policies
• Shared programme: A coalition agreement document outlining compromises on tax, spending, constitutional reform, and Europe

Why the Lib Dems chose the Conservatives

Nick Clegg's decision was controversial within the party, but he argued:

• Legitimacy: The Conservatives won the most seats and votes, giving them the strongest mandate
• Stability: A Lib-Lab coalition would be a "coalition of the losers" and arithmetically fragile
• Credibility: Joining government would prove the Lib Dems were serious about power, not just protest
• Reform: The AV referendum was a once-in-a-generation chance for electoral reform

Many Lib Dem activists and voters, however, saw the Conservatives as ideological enemies and were horrified by the coalition.

The Coalition Years: Achievements and Betrayals (2010-2015)

The coalition government lasted the full five-year term, but it was defined by compromises that pleased neither party's base:

Lib Dem achievements (according to the party)

The Lib Dems point to several policies they delivered or influenced:

1. Income tax threshold increase: Raised from £6,475 (2010) to £10,600 (2015), taking 3 million low earners out of income tax—a flagship Lib Dem manifesto pledge
2. Same-sex marriage: Legalised in 2013, with Lib Dem support crucial in overcoming Conservative opposition (136 Tory MPs voted against)
3. Pupil premium: £2.5 billion per year targeted at disadvantaged students, a Lib Dem policy
4. Blocked Conservative policies: Prevented grammar school expansion, inheritance tax cuts, and weakening of workers' rights
5. Green policies: Green Investment Bank, renewable energy subsidies, carbon reduction targets
6. Pensions: "Triple lock" guaranteeing state pension rises by inflation, earnings, or 2.5% (whichever is highest)

The tuition fees betrayal: The defining broken promise

The tuition fees U-turn became the coalition's most toxic legacy for the Lib Dems:

• 2010 manifesto pledge: All Lib Dem MPs signed a pledge to "vote against any increase in fees" and to "work to abolish tuition fees"
• Reality: In November 2010, the coalition voted to triple tuition fees from £3,290 to £9,000 per year
• Lib Dem response: 21 Lib Dem MPs voted for the increase, 21 abstained, and only 8 voted against (including Tim Farron, who later became leader)

The betrayal was devastating:

• Youth vote collapse: The Lib Dems had won 30% of 18-24 year olds in 2010; by 2015, this fell to 5%
• Trust destroyed: The broken pledge became a symbol of political dishonesty, immortalised in viral videos and protests
• NUS campaign: The National Union of Students ran a relentless campaign against Lib Dem MPs, with protests and "Liar Liar" posters

Nick Clegg later apologised (in a 2012 video that became a satirical song), but the damage was irreversible.

Austerity: Enabling Conservative cuts

The coalition implemented a deficit reduction programme that cut public spending by £81 billion between 2010 and 2015:

• Welfare cuts: Bedroom tax, benefit cap, disability benefit cuts, public sector pay freeze
• Local government: Council budgets cut by 40% in real terms, hitting services and jobs
• NHS reorganisation: The 2012 Health and Social Care Act, opposed by many Lib Dems, introduced market competition into the NHS
• Public sector job losses: Over 400,000 public sector jobs cut

The Lib Dems argued they had moderated Conservative instincts (blocking deeper cuts to welfare and the NHS), but voters saw them as enablers of austerity. The left-wing base that had supported the Lib Dems as an anti-Iraq War, anti-tuition fees party felt betrayed.

The Alternative Vote referendum: A crushing defeat

The AV referendum (5 May 2011) was the Lib Dems' key constitutional prize from the coalition, but it became a disaster:

• The proposal: Replace First Past the Post (FPTP) with Alternative Vote (AV), where voters rank candidates and the least popular are eliminated until someone has 50%+
• The campaign: The "No to AV" campaign, backed by Conservatives and Labour, ran a brutal campaign portraying AV as complex, expensive, and a gift to the Lib Dems
• The result: 68% No, 32% Yes on a 42% turnout—a landslide defeat

The referendum defeat had several consequences:

• No electoral reform: The Lib Dems' main reason for entering coalition was denied
• Weakened Clegg: The defeat exposed Clegg's weakness and the coalition's unpopularity
• No second chance: Electoral reform was off the agenda for a generation

The 2015 Wipeout: From 57 Seats to 8

The 2015 general election (7 May 2015) was catastrophic for the Liberal Democrats:

Results

• Seats: 8 (down 49 from 57)
• Vote share: 7.9% (down 15.1 percentage points from 23%)
• Lost deposits: 340 constituencies (losing deposits in over half the seats they contested)

Seats lost

The Lib Dems lost seats across the country, including:

• Nick Clegg's majority: Reduced from 15,284 to 2,353 in Sheffield Hallam (he lost the seat in 2017)
• Vince Cable: Lost Twickenham (won back in 2017)
• Ed Davey: Lost Kingston and Surbiton (won back in 2017)
• Simon Hughes: Lost Bermondsey, held since 1983
• Danny Alexander: Lost Inverness, Nairn, Badenoch and Strathspey to the SNP

Why the wipeout happened

1. Tuition fees: The broken promise destroyed trust with young voters and students
2. Austerity: Left-wing Lib Dem voters switched to Labour or the Greens
3. Tactical voting collapse: In 2010, many voters tactically backed the Lib Dems to keep out Conservatives or Labour; in 2015, they switched back
4. SNP surge: In Scotland, the Lib Dems lost 10 of their 11 seats to the SNP, which won 56 of 59 Scottish seats
5. Squeezed by polarisation: The election became a choice between Conservative or Labour government, leaving no space for a third party

The leadership crisis

Nick Clegg resigned on election night. The party elected Tim Farron as leader in July 2015, but with only 8 MPs, the Lib Dems were reduced to irrelevance.

The Long Road Back: 2015-2024

The Lib Dems have partially recovered, but remain far from their 2010 strength:

2017 election: Modest recovery

• Seats: 12 (up 4)
• Vote share: 7.4% (down 0.5 percentage points)
• Strategy: Pro-EU positioning after Brexit referendum, targeting Remain-voting constituencies

2019 election: Revoke Article 50 gamble fails

• Seats: 11 (down 1)
• Vote share: 11.6% (up 4.2 percentage points)
• Leader: Jo Swinson (lost her seat)
• Strategy: "Revoke Article 50" pledge to cancel Brexit without a second referendum—seen as undemocratic and cost votes

2024 election: Blue Wall breakthrough

• Seats: 72 (up 61)
• Vote share: 12.2% (up 0.6 percentage points)
• Leader: Ed Davey
• Strategy: Target wealthy Conservative-held seats in southern England (the "Blue Wall"), focus on NHS, cost of living, and sewage in rivers

The 2024 result was the Lib Dems' best since 2010, but it was driven by tactical voting and Conservative collapse rather than a surge in Lib Dem support. The party's vote share (12.2%) was still far below 2010 (23%).

The Coalition's Legacy: Lessons and Consequences

The coalition reshaped British politics in several ways:

1. Coalition government is now thinkable