Otagolad:
Called Spark and they have "upgraded" me and will take up to 72 hours - very easy so all good, although still not quite sure why all 200/200 customers weren't simply migrated on day one as it would be hard to be think of any 200/200 customer who would want to stay at that speed and not be upgraded.
It was considered and there are reasons for us not to automatically migrate everyone on day 1. Sorry I can't be more specific. One massively mitigating factor is that I doubt there are many 200/200 customers out there feeling their connection is too slow!
Glad you got the upgrade sorted.
Cheers -N