There will be a 30 minute downtime at 10am (UK) to take a backup/clone and apply a mod patch, this is the first half (mod side) of a fix for the Quarry issues we are currently experiencing, the second half (plugin side) is being worked on now and should hopefully be ready in a matter of days.
As usual, I'll update here as I go.
Update: 12:40 - All done, server is now back up!