Thanks for all the efforts you have put into this site!
As a result of many problems with EON (see my previous posts) I changed over to OVO (with two adjacent properties) Both are now on OVO’s better Energy tariff but at significantly different prices to your quoted rates. Both properties have E10 metering and no gas. I use the “online” option providing regular meter readings and only email contact for any queries. 
I understand the increasing consumption prices as the wholesale prices have increased BUT the SC is much higher than your figure(s) adding about £55/year to each property??
In general OVO have been much better to deal with than EON but their standing changes seem rather higher than I would expect- any idea why?