NORMAL SERVICE HAS BEEN RESUMED
I contacted 1&1 who host my site and they came back with..
'We have tried to check on your case and it seems that your domain is one of the affected domains for the issue that we have on the server.
We sincerely apologize for the inconvenience that this technical glitch has brought you.
This is a bug on the system that is already known and reported to our developers. At the moment, we do not have an estimated time frame for the fix.
In order for us to help you more, may we ask if you happen to have a back up copy of your data files.
If so, we would like to ask you to please try to update the data files that you have in your webspace as an alternative way in order to fix your website.'
..so I've re-posted the home page to my site and things are now working fine from here... and hopefully everybody else as well
http://www.timetraveldvds.co.uk/