I've taken the server down for a full backup / clone to make sure the test server includes all the recent changes, being a Monday morning it's always very quiet so I figured it was the best time, the server should be back up by around 9am (UK time).
UPDATE: 09:05 - Locked myself out of the house, currently trying to borrow a ladder so I can climb through a window (posted from my phone)!
UPDATE: 09:45 - I'm in! I'll just check over everything and hopefully get the server back up in 5-10 minutes.
UPDATE: 09:50 - Server is back up and whitelist is removed, sorry about the delay!