Monday 15 November 2010 6.51pm
OK, we're now in the process of ordering a new dedicated server with a different hosting company.
The present server is now more than 5 years old and is rather clapped out.
Migrating all the content and databases won't be fun, but the performance improvement should make it worth the hassle.
In the meantime I think I've found a workaround for the problems afflicting the server on Sunday and Monday morning, and the speed, while not great, should be back to normal levels.