The Strange Death of Centrist England or Make Britain Great Again
2010-2014: David Cameron (Conservative)
2010 (Coalition with Liberal Democrats) def. Gordon Brown (Labour), Nick Clegg (Liberal Democrat)
2014-2017: Adam Afriyie (Conservative)
2014 (Majority) def. David Miliband (Labour), Nick Clegg (Liberal Democrat), Alex Salmond (Scottish National Party)
2017-2021: Dale Winton (Conservative)
2018 (Majority) def. Yvette Cooper (Labour), Jo Swinson (Liberal Democrat), Alex Neil (Scottish National Party)
2021-2026: Dennis Skinner (Labour)
2021 (Majority) def. Dale Winton (Conservative), Jo Swinson / Anna Soubry / Chuka Umuna / Nicola Sturgeon (Liberal Democrat / Open Nation / Progressive / 'Gradual' Scottish Nationalists --- Progressive Alliance)
The Liberals maintain the Clegg-gasm of 2010 and Cameron's coalition is even more reliant on their support. The Conservative Party is a rather more right-wing party on it's backbenches than OTL due to their reduced numbers and the watering down of right-wing legislation leads to a build up in frustration that leads to a coup of Cameron in 2014. After a short-lived minority government, Afriyie wins a majority, mostly thanks to the collapse in the Liberals, sinking below 20 seats. Later in the year, the Scottish independence referendum produces a NO victory.
Afriyie's first order of business is a referendum on the European Union, and campaigns to Leave. This causes ructions within the Conservative Party and after Boris Johnson prominently spearheads Remain, the country narrowly votes to Remain in the EU. Afriyie resigns in disappointment, and at the ensuing leadership election, newcomer to the parliamentary benches Dale Winton surfs a wave of Euroscepticism in the Tory membership to achieve victory.
In 2018, Winton dissolves Parliament and his opposition consists of a seemingly stagnant Labour Party, the cautiously resurgent Liberal Democrats, and the fractious SNP. The Nationalist's initial spike in support in 2014 has withered after four years, especially after Salmond's resignation led to fractious leadership election and the victory of the fundamentalist faction. Winton wins a majority on a much reduced popular vote. and the next three years are chaotic as Winton poses a radical nationalist agenda that sees the country's already strained relationship with Europe worsen. Meanwhile, the Labour Party elects a leader from the left-wing and the moderates in the party secede after two failed attempts to unseat him in the face of swollen membership.
The secession of pro-European moderates in the Conservative party filches Winton of his majority and his government falls. The Labour party win a large majority as the centrist Progressive Alliance eat into Conservative majorities up and down the country. The Progressives altogether have a little over fifty seats, while Labour have achieved their best result since 2001. How long the new Prime Minister will last is anyone's guess.