Other things that the supplier will be responsible for are teaching people how to use their smart meter, providing a copy of the instructions to the customer, and explaining how to use energy efficiently.

They should also provide a number to call if anything goes wrong.

Pre-payment smart meters are also available, however, Citizens Advice says that prepayment is “usually a more expensive way of paying for energy”.

The consumer group reminds Britons that smart meters are not compulsory and if a supplier says otherwise, them a person could contact the Citizens Advice helpline.

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