Gianfranco Baldini is Associate Professor of Political Science at the University of Bologna, Italy, and Research Associate at the Centre for Britain and Europe, University of Surrey, UK.

Edoardo Bressanelli is Associate Professor of Political Science at the Sant'Anna School of Advanced Studies in Pisa, Italy, and Senior Visiting Research Fellow at King's College London, UK.

Emanuele Massetti is Associate Professor of Political Science at the University of Trento, Italy, and Associated Fellow at the Centre on Constitutional Change, University of Edinburgh, UK.

Introduction 1. The Westminster model and the UK political system before Brexit 2. Understanding the Brexit effect 3. Westminster preserved: Elections, party system, and the absorption of the Brexit shock 4. Westminster challenged: The constrained dominance of the executive 5. Westminster reasserted: A unitary but disunited state 6. Understanding the Brexit strains during the Covid crisis 7. Conclusions: British politics after Brexit