Proroging parliament was unlawful

The UK Supreme Court just ruled that the prorogation of parliament was unlawful, which means it didn't happen.

https://www.supremecourt.uk/cases/uksc-2019-0193.html

https://www.bbc.co.uk/news/uk-politics-49810261

This is a pretty big deal.

It's hard to see how Johnson can continue as PM.