The 9th European Parliament was elected across the European Union in the late days of May 2019 for the 2019–2024 session. In the United Kingdom the election took place on 23 May. The elected MEPs sat until the formal Brexit date – 31 January 2020.[1][2]
Alyn Smith won a seat in the House of Commons for SNP in December 2019. He therefore ceased to be an MEP for Scotland then. Heather Anderson was nominated to replace him as MEP. Anderson only served as MEP from 28 January until the Brexit date on 31 January, a total of 4 days.
^"Article 50 extension". Institute for Government. 12 December 2018. Retrieved 27 May 2019. If the UK and the EU ratify the Withdrawal Agreement before the new European Parliament sits for the first time on 2 July, then the 73 new UK MEPs would not take up their seats