Scotland ceased to exist as a sovereign state in 1707, as did England, when the Acts of Union (1707) created the unified Kingdom of Great Britain, but has a long-standing separatist movement, with polls suggesting in January 2020 that 52% of eligible voters would vote for an independent Scotland. The region's largest political party, the Scottish National Party, campaigns for Scottish independence. A referendum on independence was held in 2014, where it was rejected by 55% of voters. The Independence debate continued throughout the UK referendum on EU membership where Scotland voted 62-38 (turnout 67%) to remain a member of the EU. Results in the rest of the UK, however, led to the whole of Great Britain leaving the EU. In late 2019 the Scottish Government announced plans to demand a second referendum on Scottish Independence. This was given assent by the Scottish Parliament but, as of February 2020, British Prime Minister Boris Johnson has refused to grant the powers required to hold another referendum on the grounds that both sides accepted beforehand that the 2014 vote would settle the matter for a generation.