Final answer:
Brexit, the UK leaving the EU in 2016, was driven by concerns over sovereignty and immigration.
Explanation:
Brexit, the term used to describe the United Kingdom's decision to leave the European Union (EU), was a significant event that took place in 2016. The UK's departure from the EU was influenced by factors such as concerns over sovereignty and immigration, as well as disagreements over the direction of the EU towards greater political integration.
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