Which British historical treaty or law had the most lasting impact on everyday life?

Forced upon King John at Runnymede, it planted the idea that even monarchs answer to the law. Its echoes still ring through constitutions worldwide.

This merger created the Kingdom of Great Britain and reshaped politics, trade and identity north and south of the border. Its consequences are still debated at Holyrood today.

It gave the vote to women over 30 and most working-class men, transforming British democracy almost overnight. The 1928 Act finished the job with equal suffrage.

Bevan's brainchild launched the NHS in 1948 and remains one of the most cherished British institutions. It redefined the relationship between citizen and state.

After decades of campaigning by Wilberforce, Equiano and others, Parliament banned the transatlantic slave trade. Full emancipation across the Empire followed in 1833.