ARCHIVED: This Practice Note has been archived and is not maintained. This Practice Note considers the question of when a court is seised of proceedings under Article 32 of Regulation (EU) 1215/2012, Brussels I (recast). Deciding which court is first seised is fundamental to the operation of Articles 29–31 of Regulation (EU) 1215/2012, Brussels I (recast) which concern the prevention and regulation of concurrent proceedings. For information on the equivalent provisions within Regulation (EC) 44/2001, Brussels I, see Practice Note: Brussels I—when is a court seized ? (art 30) [Archived]. Impact of UK’s departure from the EU Following exit day (ie 31 January 2020), the UK became a third state in respect of Regulation (EU) 1215/2012, Brussels I (recast). As a result of transitional provisions in the Withdrawal Agreement between the UK and the EU, the UK remained subject to Regulation (EU) 1215/2012, Brussels I (recast) during the implementation period, which began on exit day and ended on IP completion day (ie 31 December 2020, at 11 pm). The