There are a couple of reasons why your gas may have been an estimate:
• The meter reader may not have had access to your property.
• If you have a smart meter, it may not have been communicating on the scheduled billing date.
Please note, your estimate read will be corrected when you get an actual read the following month, so there is no need to generate a new bill.
Your next bill from us will be based on an actual read and any difference between your last actual read and your next actual read would be balanced out.