Historic studies of 1960s British election contests often considered the national political dynamics the major determinant in any poll result. This article carefully evaluates how far a combination of political, social, economic, cultural, and environmental factors might have determined the outcome in a specific contest. It considers how they interacted and demonstrates that such an approach can help scholars evaluate the result, and consider the significance, of the Leyton contest of January 1965. While other scholars have noted the significance of Leyton, no comprehensive study exists despite abundant and accessible source material. Alongside addressing this gap in the literature, this article suggests that Leyton-specific issues, such as the town’s larger than usual population of retired residents, was more influential than supposed problems associated with Labour’s candidate, Patrick Gordon Walker, and his previous defeat at the Smethwick constituency.