This article investigates whether partisanship or policy preferences drive electoral outcomes in the United Kingdom during Brexit-related elections.

Introduction: The study examines voter behavior amidst a significant political upheaval — Brexit.

Data & Methods: It utilizes quasi-experimental techniques and analyzes polling data from across the UK electoral landscape.

Key Findings: Results indicate that while policy positions matter, partisan loyalty often proves a more powerful predictor of voting patterns in this specific context.

Implications: The findings challenge conventional assumptions about political representation and offer nuanced insights into descriptive representation debates.

The analysis suggests that partisanship remains a dominant factor even when evaluating complex issues related to Brexit.