BRIEFING PAPER Number 9006, 24 September 2020 The Prorogation Dispute By Graeme Cowie of 2019: one year on Adam Cygan Contents: 1. Political context of the dispute 2. The Prorogation decision 3. Litigation prior to the Supreme Court 4. UK Supreme Court judgment 5. Impact of Miller II/Cherry www.parliament.uk/commons-library | intranet.parliament.uk/commons-library |
[email protected] | @commonslibrary 2 The Prorogation Dispute of 2019: one year on Contents Summary 3 1. Political context of the dispute 4 1.1 Prorogation generally 4 1.2 Prorogation and Brexit 5 1.3 Northern Ireland (Executive Formation etc) Act 2019 5 1.4 Parliament’s periodic adjournments 6 2. The Prorogation decision 7 2.1 Order in Council 7 2.2 EU (Withdrawal) (No. 6) Bill 2017-19 8 2.3 Prorogation ceremony 8 3. Litigation prior to the Supreme Court 10 3.1 Scottish courts – the Cherry litigation 10 3.2 English courts – the Miller II litigation 13 4. UK Supreme Court judgment 17 4.1 Summary of proceedings 17 4.2 Justiciability of Prorogation 19 4.3 Limits on the extent of the power to prorogue 21 4.4 The legal test adopted and applied 24 4.5 Remedies 26 4.6 A Parliamentary session restored 28 5. Impact of Miller II/Cherry 30 5.1 Legal limits on prorogation 30 5.2 Statutory limits 30 5.3 Common law “reasonable justification” 32 5.4 Reform of the law on prorogation 38 Contributing Authors: Adam Cygan is a Professor at Leicester Law School and a Parliamentary Academic Fellow with the House of Commons Library.