Gas leak found by Bulb

I have just started using bulb and have given my first meter readings with them. However, they questioned the amount of gas I was using because it seemed excessive. It was!!! We got our meter for a leak as there was a faint smell of gas. (the meters are outside the property).
We have been told that the leak would be costing us approximately 5% more.
Thank you Bulb. You have inadvertently alerted to a problem that we would otherwise not have known about if we had not changed supplier.