The EU had a strong impact on UK Parliament Sovereignty.

• There was several referendums over the EU
• Parliament had a breakdown during Brexit negotiations
• UK judges had to give precedence to EU law when making judgements (supremacy)
• Political parties were divided
  • Theresa May could not pass a Brexit deal
  • David Cameron resigned
  • Boris Johnson was strengthened
  • Strengthened party support
• Affected voting behaviour - leave/remain age divide