Yes, the reminders are for both electricity and gas because both bills are due at the same time – you’ll normally receive these in a combined statement.

You don’t have to submit your electricity and gas readings together, but if you don’t submit a gas reading you may not receive a gas bill on your statement.

Note: If you have a smart meter for electricity with Interval (30 minute) Smart Services enabled, you don't need to submit readings as your usage is logged remotely by your meter. If your meter has Non-Interval (Bi-Monthly) Smart Services enabled, it's still recommended that you submit regular meter readings. You should continue to submit your gas readings regularly.