Examples

• 1973

  Referendums were unknown in the UK until 1973, when voters is NI were asked wether they wanted to stay in the UK.
• National referendum

  The first national referendum was held by Labour PM Harold Wilson, over joining the EEC.
• 2016

  The most far reaching and impactful referendum was the vote for Brexit, held by David Cameron. Ultimately leading to his resignation and introducing May, who later resigned over division over the issue.