1. What was a key characteristic of UK political relations between the main parties before Margaret Thatcher's leadership?
A consensus on the role of trade unions and public services
Explication
The source explicitly states that before Thatcher, UK politics was characterized by a consensus between main parties on the role of trade unions and public services like health and education, making this the defining feature of political relations at the time. Review: Political context and party relations in the UK before Thatcher. Course evidence: "Before Thatcher, UK politics was characterized by a consensus between main parties on the role of trade unions and public services like health and education."