I got the following email from my host last week.
“As part of an ongoing programme to improve the service we deliver to you, we will be migrating your professional hosting account for gordon-valentine.com from the server currently powering it to a more powerful, up to date server.
As part of this move, Plesk will no longer be involved as the control panel on your server and all changes to your account can be made through our control panel.
Your website will be unavailable for up to an hour next Wednesday 9th January 2013.
E-mail will not be affected during this move.”
So when you can’t access this website for a number of hours today at some point you know why.