As many of you will be aware, TalkTalk recently announced they had suffered a large hack due to a simple SQL injection after a DDoS attack.
At the same time, a vulnerability was discovered in the Joomla! framework, affecting versions 3.0 - 3.4 which many (not all) of your sites run.
This vulnerability was patched and the update rolled out to all sites affected - as a result, some functionality of your websites may be affected - if you spot any issues, please open a support ticket and mark it as Urgent.