Switch over

I had a payment to bulb taken at the start of the month, but today I have had payment from my old supplier taken as well, is that normal? I thought that once payment was taken the switch had happened?

I had a payment to bulb taken at the start of the month, but today I have had payment from my old supplier taken as well, is that normal? I thought that once payment was taken the switch had happened?

Yes it is normal your old supplier is charging you for the energy you used until you switched to Bulb, More detailed information is at: https://help.bulb.co.uk/hc/en-us/articles/360000313371-Why-is-my-old-supplier-still-charging-me-