The distribution and transmission charges that cover the cost of transporting gas make up around 34% of your business gas bill.
You might have noticed a difference between your wholesale gas price and the total cost of gas that you pay. That's where other charges such as gas transportation come in. For example, different companies manage and maintain the pipes that transport gas to the meter with the associated costs passed on via suppliers.
For a detailed overview on gas Transportation Charges, check out Gas transportation charges explained.