Thank you all for your patience, the forum is back up and running.
Apologies to those trying to log onto the site, the problem is located at the data centre where our server is located, and is affecting multiple forums across multiple severs.
They are currently working on the issue and hopefully will get us back up and running fully again.
Update:- It might take most of the day to resolve this issue. (The switch off and switch on did not work this time!)