I called the customer service as I don't understand why I can't switch our provider from EDF to Octopus. Zak was polite and said we need to pay £150 deposit for electricity and £150 deposit for gas. I don't understand, though, why that is. My credit rate has always been great. We are trying to switch as according my calculations we can potentially save £100 a year which is not a huge amount but every little helps. I however am not sure if I would like to go through the switch now with all the deposit we have to pay. And I don't understand why. We will pay by direct debit so no payment will be missed.