Issues with connecting to the shared SQL Servers have been resolved. This fault was caused by 'out of schedule' Microsoft Windows Update reboots. We have implemented preventative measures to stop this problem from re-occurring in the short term future and are planning to make changes to the configuration to further improve the reliability in the near future. Sincere apologies for any inconvenience caused.
We are investigating issues with connectivity to the shared SQL servers. More information to follow.