I am assuming I am doing this correctly for both gas and electicity (been in the property only 6 months):
Cost = (Current Reading - first reading * KWh rate) + (Standing charge * number of days)
If the above is right, then I do not understand why Bulb have asked for £41 more per month on my DD. All their estimated readings are less than my submitted readings, and I calculated my overall cost using the above on my manual readings.
anyone have an idea?
Edit: My current DD amount probably needs to go up a bit, maybe £10 to cover the shortfall to date and rest of the year, but certainly not £41