My power saving measures appear to be working.

The power bill arrived this morning and the only shock was a reasonable drop in usage.

The steps I've taken to reduce the bill have worked and there's pretty well nothing more I can do unless I give up the comfort of air conditioning.
Interesting that the meter appears to have been read on a Saturday, this would have happened due to us being underwater on the scheduled day, it's really nice to know they put a bit of extra effort into it rather than just run up an averaged account.