Gas shipper
What is a gas shipper?
Three different companies touch your business gas before it reaches your meter, and most people only ever hear about one of them, the supplier who sends the bill. The gas shipper is the middle link, the licensed party that arranges to move your gas through the national and local pipes and keeps the books balanced with the pipeline operators. You will not have a contract with a shipper or ever speak to one, but the role is why your bill has transportation costs on it, and it quietly matters when you switch supplier. Here is what a gas shipper does.
On this page
A gas shipper sits between the companies that own the pipes and the supplier that sells you gas. Often the supplier and shipper are the same business, but the roles are legally distinct, and knowing the difference makes a gas bill much easier to read.
What a gas shipper actually is
A gas shipper is a licensed company that arranges the transportation of gas through the pipeline network, from the point it enters the system to the point it is supplied to a customer. Every gas supply in Great Britain has to have a registered shipper. The shipper does not own the pipes and does not sell you the gas. It is the party that contracts with the pipeline operators to move the gas and takes responsibility for keeping the flows in balance.
In many cases the shipper and the supplier are the same company, or part of the same group, so you never see the distinction. But they are separate licensed roles, and larger and independent suppliers sometimes use a third-party shipper.
What a gas shipper does
The shipper’s job breaks down into a few core tasks:
- Booking transportation capacity on the national and local networks so there is room to move the gas.
- Nominating and balancing the volumes of gas going in and coming out, so inputs and offtakes match across the day.
- Registering supply points and holding the shipper agreement for each meter it is responsible for.
- Paying the transporters for use of the network and recovering those costs through the supply chain.
All of this happens upstream of your bill, but it is the machinery that gets gas physically to your premises.
Shipper vs supplier vs transporter
Three roles, easy to muddle:
| Role | What they do |
|---|---|
| Transporter | Owns and operates the pipes, the national transmission system and the local distribution networks |
| Shipper | Arranges to move gas through those pipes and keeps inputs and offtakes balanced |
| Supplier | Sells gas to the end customer and sends the bill |
The transporter owns the road, the shipper arranges the haulage, and the supplier is the company you buy from. A single business can hold more than one of these licences, which is why the shipper is usually invisible to you.
Capacity and balancing
Two of the shipper’s jobs are worth understanding because they explain part of your bill. Capacity is the right to flow a certain amount of gas through the network, which the shipper books and pays for. Balancing means keeping the gas the shipper puts into the system each day roughly equal to what its customers take out. If a shipper is out of balance, it pays charges to correct it.
Both of these costs, capacity and balancing, are part of the transportation element that ends up inside your gas unit rate, alongside the charge for using your local distribution zone.
Independent gas transporters
On many newer developments the local pipes are owned not by the regional gas network but by an Independent Gas Transporter (IGT). The shipper then arranges transport across the IGT’s network as well as the main system, and IGT-connected sites sometimes carry a slightly different transportation charge. If your premises are on a modern estate or business park, there is a reasonable chance an IGT owns your final connection. It does not change how you buy gas, but it can explain a difference in the transportation element of your bill compared with a similar site elsewhere.
The shipper and switching supplier
When you switch business gas supplier, the shipper registration on your meter changes as part of the process, usually to the new supplier’s own shipper. This happens behind the scenes and does not interrupt your supply. The gas keeps flowing through the same pipes; only the commercial arrangements change.
You do not need to do anything about the shipper when you switch. Your new supplier handles the registration, using your MPRN to identify the supply point. It is one of the reasons a switch is mostly paperwork rather than physical work.
The central data system
Shippers rely on a central data system to register supply points, track ownership and handle changes of shipper and supplier. This central data service, run for the gas industry, keeps everyone working from the same record of who is responsible for which meter. When a switch stalls, it is often a data issue at this level, a mismatched MPRN or an out-of-date annual quantity, rather than anything physical.
For a business, the practical takeaway is that clean, correct supply point data, starting with the right MPRN and an accurate annual quantity, makes switching and billing run smoothly.
How shipping shows up on your bill
You will not see a line marked shipper on a business gas bill. The shipper’s costs, capacity, balancing and transportation, are folded into the transportation element of your rate. On a fixed contract this is all bundled into the unit rate. On a pass-through contract, transportation may be itemised as its own line.
Because these costs are set by the transporters and passed through the shipper, they are not something you negotiate directly. What you can control is the supply contract wrapped around them, which is where comparing suppliers earns its keep.
A worked example
To see where shipping sits, imagine a simplified business gas unit rate of 4.0 p/kWh:
| Component | Illustrative share |
|---|---|
| Wholesale gas (NBP-based) | 2.7 p/kWh |
| Transportation (shipper-arranged network costs) | 0.5 p/kWh |
| Policy, metering and margin | 0.8 p/kWh |
Example only. Real proportions vary widely by supplier, site and contract, so treat this as illustrative rather than a quote.
The transportation slice is the part the shipper’s capacity and balancing costs feed into. It is rarely the biggest element, but it is real, and it is why understanding the shipper role helps you read a bill.
What it means for your business
For nearly every business, the shipper is a role to understand rather than manage. You buy from a supplier, the supplier arranges shipping, and the gas arrives. The value in knowing the term is that it demystifies a gas bill: when you see transportation costs, you now know that a licensed shipper booked the capacity and balanced the flows to make your supply happen. If you ever review a bill line by line during bill validation, the transportation element is one of the parts worth understanding rather than glossing over.
Frequently asked questions
What is a gas shipper?
A gas shipper is a licensed company that arranges the transport of gas through the pipeline network on a supplier’s behalf. It books capacity, keeps inputs and offtakes balanced, and holds the shipper agreement for each supply point.
Is a gas shipper the same as my supplier?
Not necessarily, though they are often the same company or part of the same group. The supplier sells you gas and sends the bill; the shipper arranges to move the gas through the network. They are separate licensed roles.
Do I have a contract with a gas shipper?
No. Your contract is with your supplier. The shipper works upstream, arranging transport and paying the network operators. You never deal with a shipper directly.
What is the difference between a shipper and a transporter?
The transporter owns and operates the pipes, the national and local gas networks. The shipper arranges to move gas through those pipes and keeps the flows balanced. The transporter owns the road; the shipper arranges the haulage.
What does a gas shipper actually do?
It books transportation capacity, nominates and balances gas volumes so inputs match offtakes, registers supply points, and pays the transporters for use of the network. All of it happens upstream of your bill.
What is an Independent Gas Transporter?
An Independent Gas Transporter, or IGT, owns the local gas pipes on many newer developments instead of the regional network. The shipper arranges transport across the IGT’s network, and IGT-connected sites can carry a slightly different transportation charge.
Does the shipper change when I switch supplier?
Yes. The shipper registration on your meter usually moves to your new supplier’s shipper as part of the switch. It happens behind the scenes using your MPRN and does not interrupt your gas supply.
What is gas balancing?
Balancing means keeping the gas a shipper puts into the network each day roughly equal to what its customers take out. If a shipper is out of balance, it pays charges to correct it. Those costs feed into transportation charges.
Do shipper costs affect my gas bill?
Yes, indirectly. The shipper’s capacity, balancing and transportation costs are folded into the transportation element of your unit rate. On a fixed contract they are bundled in; on a pass-through contract transportation may be a separate line.
How big is the transportation part of a gas bill?
It varies, but it is usually a modest slice rather than the biggest element. As an illustration, on a 4 p/kWh rate transportation might be around 0.5 p/kWh, with wholesale gas the largest part. Real proportions differ by supplier and site.
Can one company be both shipper and supplier?
Yes. Many suppliers hold both a shipper and a supplier licence, which is why the shipper role is usually invisible to customers. Some suppliers instead use a third-party shipper.
Do I need to do anything about the shipper when I switch?
No. Your new supplier handles the shipper registration as part of the switch, using your MPRN to identify the supply point. There is no separate action for you to take.
How is a gas shipper regulated?
Shippers hold a licence and operate under the industry codes governing gas transportation and balancing, overseen by the regulator, Ofgem. The rules cover capacity, balancing and how supply points are registered.
Why does the shipper matter for switching?
Because the switch involves updating the shipper registration on your supply point. Clean data, starting with the correct MPRN and an accurate annual quantity, is what keeps that process running smoothly and avoids delays.
Why might my transportation charge differ from a similar business?
Location and network matter. Different local distribution zones carry different transportation costs, and if an Independent Gas Transporter owns your connection the charge can differ again. That is why two similar sites can see different transportation elements.
Xoserve central data services (xoserve.com) · Uniform Network Code industry standards · Ofgem (ofgem.gov.uk)