This was an interlocutory dispute about disclosure and about the form and quantum of security for costs to be provided in a class action (including whether security by way of a guarantee from a third party after-the-event insurer remained adequate security despite financial uncertainty arising from the Covid-19 crisis).
Damian Clothier QC (with S Hooper) appeared for the defendants, instructed by King & Wood Mallesons.
Michael May (with L Armstrong QC) appeared for the plaintiffs, instructed by Clyde & Co.
The judgment is available here.