So, after checking at midnight for no download - and now at around mid day (London Time), the steinberg site is back up from maintenance!
I bought the update from Cubase 6 to Cubase 7 - checkout went fine!
Started the download - 1.43GB
The download got to 99% and then cancelled!
Retrying the download now - the server seemed to have crashed - but i got another instance of the download going now! a LOT LOT slower now though!