You will need to give readings after you switch.
The next generation of smart meters (called SMETS2), which will remain smart after you switch, will be available in 2019.
Here is a link to more info about the rollout of SMETS2 smart meters.
Here’s how to read your smart meter, depending on your meter’s interface:
Please note that you don’t need to include any digits after a decimal point.
Smart meters with numeric keypads
To activate the display and show the current reading, press the number '9' on the meter keypad. Your current reading is the first number to be shown; it will be labelled ‘IMP KWH’ on your electricity meter and ‘VOLUME’ on your gas meter.
If you have an Economy 7 smart meter, you will need to press the number ‘6’ to get your day and night readings. They are labelled ‘IMP R01’ and ‘IMP R02’ respectively.
Smart meters with a green 'A' button
Press the green button until you see ‘TOTAL ACT IMPORT’ shown on the display. The next number shown is the current meter reading.
Note - if you were previously on the British Gas Home Energy Freetime tariff, you should give two readings. There are three simple steps to take:
1. Tap the green A button 3 or 4 times to go through the options.
2. Keep scrolling through options until the meter reading display screen shows 'total act import'. This shows your meter reading.
3. Press the button again and you will see 'R1' for the first rate reading, press the button again for 'R2', the second rate reading.
Smart meters with 'A' and 'B' buttons
Press the ‘A’ button to activate the display. Wait until ‘meter index’ is shown; the number underneath is the current meter reading.
Got a standard, non-smart meter? Here's some info on how to read a meter