Superficially, the period of Conservative rule since 2010 has been one of electoral stability. The Conservatives emerged as the largest party in four general elections in a row. As a result, the party has retained the reins of power for fourteen years. This represents the second longest period of government tenure for any one party in post-war British politics. Yet, in truth, it has been a period of unprecedented electoral instability and political change. Two of the four elections produced a hung parliament, an outcome that had only occurred once before in the post-war period, while a third only produced a small overall majority. After the first of these hung parliaments, in 2010, Britain was governed by a coalition for the first time since 1945, while in the second such parliament, between 2017 and 2019, a minority government entered into a ‘confidence and supply’ agreement with the Northern Irish Democratic Unionists. The right of prime ministers to call an election at a time of their own choosing was taken away, only to result in parliamentary tussles that, in the event, failed to stop two prime ministers from eventually holding an election well before the parliamentary term was due to come to an end.