Null, & of no effect: R (on the application of Miller) (Appellant) v The Prime Minister (Respondent) and Cherry & Ors (Respondents) v Advocate General for Scotland (Appellant) (Scotland)

To adopt the description of my learned colleague in Chambers: “This is absolutely massive. Was justiciable and was unlawful. Prorogation was void and of no effect.”

High Court of England & Wales v Inner House of the Court of Session

The highest courts in England and Wales, and in Scotland, considered prorogation in principle, and the decision to prorogue on 9 September 2019 in practice, before coming to a different, reasoned judgment and opinion, respectively.