It's up, I just checked. My guess is it was changing tracks. When CTRA servers change tracks they go password protected to prevent new joiners from resetting the 'ready' flags of those trying to get the race going again.
Yes it worked! I realized that Browse for speed when set to "S2" cannot find S1 only servers. Seeing that 1A and 2A are S1.. i couldnt see them. Problem solved!
I've just restarted the UKCT server. We had some critical updates to install. Because of changes that have been made to the config files previously, the servers are now all renamed "CTRA".