Gas meter reading more numbers than allowed

Hi, how do I record a meter reading from the gas meter that has gone into 5 digits? For example, it was previously say 9985 and now is 10123. There are only 4 boxes to record in?
Thanks

A possible explanation is that you have a 5 digit metric meter but bulb’s records are showing it as a 4 digit imperial one. You should ask them direct (Help button for contact details).