No, you will not have to pay two suppliers at the same time. Your new supplier will liaise directly with your old supplier to agree on a switch date. You will be asked for meter readings that will be used to both open your new account and close your old one. Your energy supply will switch from one supplier to another without interruption and you only have to pay one supplier for any given period. You will be issued a final bill by your old supplier which you will need to settle and if paying monthly you may receive your first bill from your new supplier fairly soon after. Please note that the two bills will be for separate periods so there will be no duplication of charges. If you are worried that the billing is not correct you will need to contact the supplier directly.
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