Brexit and party change: The Conservatives and Labour at Westminster

This article analyses the extent of party change in response to the vote for Brexit in the Conservative Party and the Labour Party. It focuses particularly on how both parties struggled to manage internal divisions and ideological conflict, and how each sought to manage the issue in terms of party competition. It argues that the Conservative Party victory at the 2019 UK general election was the result of an ultimately more effective response to the electoral dynamics unleashed by Brexit, as the party adjusted its position to successfully mobilise the coalition of Leave voters into party competition, while Labour struggled to do the same with Remain voters. In short, it suggests that substantial party change, particularly by the Conservatives, effectively averted major party system change and the realignment of British politics many analysts predicted. This case study analysis consequently contributes to the wider theoretical literature on external system shocks and party change.