The server went down earlier today and was repaired by around 9:30am UK time. Support were quick to get her back going again, but on checking the database, it needed a repair, which is why it's down at the time of writing this. We'll be back again shortly, so keep trying now & again :)
EDIT: We're up again after some repairs to the database. We're starting the process behind migration to a new server shortly, so will keep you updated on the situation and warn of any planned down time.