After battling at this for over 4 hours tonight, I have exhausted all my knowledge of googling and and button pushing where I am too tired to continue.
I have raised the issue with the server provider, so hopefully they will be able to assist me.
I, Padraig, am very sorry for the downtime of the server. What should have been a simple reboot and update has turned into something more drastic.
I will get a couple of hours of sleep and then I will return to continue working on this.