An Update.

I went ahead and contacted Stacey Roberts. After a few emails to book an engineer to visit my home (who never arrived as they'd fixed it without the need for a visit), within a week or so everything was fixed.

I am now able to read usage on-line. I have since received my first bill which reflects 'actual' usage. I should note details the fact that all the prior estimation was in my favour for all the while I was trying to have them fix the problems. Also the monthly bill provides excellent breakdown of usage detailing when your highest and lowest levels of consumption.

Shame it took communication with the top, but I would encourage anybody to contact Stacey if they are unhappy with the customer interface which FU provide.

stacey dot roberts at first-utility dot com