RE your reply Davc. I don't have any bill from Scottish power as I am still in the switching process. My enquiry was because old figures fro m BULB suggest your annual estimate is a bit low. This is the figure you are basing my monthly direct debit on and that was what enticed me to change supplier.
I'm just looking back at my usage for the equivalent period last year and noticed i have a huge spike for an 11 day period from 20th March to 1st April on Gas - 6589 kwH. The equivalent period from December to the end of March for this year is 7116 kwh for the entire 3 months.
Similarly on electricity i have an 11 day period which says i used 1465 - but the 3 month period from December to March 2019 is 1736kwh in total.
I know there was some bad weather last year, but this seems totally improbable that i would use the equivalent of 3 months gas and electricity in 11 days. Is there any way of double checking this or verifying whether this is correct or not?