The good news is that after a 3-4 minute chat with the Tech Support guys everything seems like it's working again! Yay!
The bad news is...well there doesn't seem to be any "at the moment" but I'll wait and see before I go into a euphoric trance and ascend to complete godhood :p
Many thanks to everyone that offered suggestions, support and help during my time off-mail. Especially to Saint Ric who travelled all the way from the wilds of Sarth London on a cranky and delayed Northern Line to come to my aid!
Right, now to start going through the backlog....