Interesting, only just been able to get into the EDF site after they sent me an email about my bill that I couldn't login to see, but long story short, they're trying to bill me based on Cash/Cheque pricing.
The prices are as follows on their variable plan:
Payment Plan Cash/Cheque (Monthly)
My unit rates Electricity unit rate:
21.78p per kWh
Daily standing charge:
28.69p per day
Gas unit rate:
4.391p per kWh
Daily standing charge:
30.78p per day
Payment Plan DD
My unit rates Electricity unit rate:
20.68p per kWh
Daily standing charge:
24.11p per day
Gas unit rate:
4.169p per kWh
Daily standing charge:
26.12p per day
I've configured DD now, but I'm asking them to re-issue my bills with the correct DD pricing, I'd encourage anyone who has been moved like me to check their bills and unit rates. EDF are understandably busy, but I don't think I've received the welcome pack from them yet, and they are already trying to overcharge me