Hi — we’ll need to go into maintenance mode tonight at midnight to deploy some under-the-hood changes to the checkout system.
This involves some data migrations, and these could take up to around 15 minutes to run.
In addition, user sessions will be logged out as part of this migration, so people will need to log back in once the site is up and running again. Unfortunately, there is no way around this, and we are sorry for any inconvenience it causes.
In the meantime, thanks for your patience whilst we undertake this essential work. We’ll keep you posted, here, as to our progress.