After much coordination and activity behind the scenes, I am being assured that site will be cleaned up and good to go again by no later than Wednesday next week (30th Nov 2016). The process of site clean-up is apparently quiet long-winded and exhaustive as EVERY recent attachment/link has to be screened and reviewed for malware.
In the meantime I would suggest that nobody open any attachments or links.
I have also been speaking to Dave Harvey from AMI who has been very helpful in the trouble shooting process.
TOR