I get a PDF from bulb every month, which I could scrub the house number etc on - you could put a picture up and I might be able to help understand it?
No, I haven't had anything from them, but thanks for the suggestion! While looking for it, I've found the PDF with details from my last bill, sent earlier this month.
This has shed some light, but also, the plot thickens...
I can see now that I was paying £77 because my account had been in credit for a long time. The actual amount of estimated energy a month was in fact £115.
The £149 a month is based on an estimate they made 3 weeks ago, it's on that bill. So this rise has nothing to do with the meter readings I sent.
It looks like they've updated the electric with the new reading on the website (which has gone up from their estimate), but not the gas (which has gone down) but not re-estimated the amount I'll use this year (yet) so goodness knows where it'll leave me when they've processed it properly.
I'll call them.. probably not for a few days though as I'm crazy busy at work
The best thing to do would be find the latest one, then also find one from a year ago (ideally where you gave them readings) and use the two to estimate yearly usage.
If you give a very low or high reading close to the bill date it takes a while to get through the system as it has to be manually verified.
Once you know how much electric and gas you have used in a year you can calculate costs at the new prices and get a reasonable estimate.