Why are existing meters being replaced?

Smart meters will replace older mechanical (and manually read) meters. When fully operational, Smart meters have the potential to bring benefits to the consumer, the environment and the economy.
With Smart meters, there will be a reduced instances of estimated bills. Should you opt for a new smart tariff, you will be able to access more accurate information about your usage.
The benefit of more accurate usage information will allow businesses to make more informed decisions on energy efficiency - ultimately helping the environment as a whole.