Welcome Tomato Energy business customers
We’re transferring business energy customers over to us from Tomato Energy. If that’s you, don’t worry. You’re in safe hands and there won't be any interruption to the energy supply to your business.
We're your new business energy supplier
When Tomato Energy stopped trading in November 2025, the industry regulator, Ofgem, asked British Gas to take over the energy supply to your business.
Not a business? Go to our British Gas residential website for help.
You're in good company
We know it wasn't your choice to switch, but you're in safe hands. British Gas is the UK’s leading business energy supplier, providing gas and electricity to over 350,000 organisations.
What happens next?
We’ll need to get some information from Tomato Energy and their administrators. This may mean that things a little longer than usual to get sorted – please bear with us while this happens.
1. Take a meter reading
We might need a meter reading to make sure your bills are correct as you move across to us. Make a note of your gas and electricity meter readings.
2. We’ll give you an account number
This will make it easy for you to manage your account and allow us to help you with anything you need. We'll let you know as soon as this is ready.
3. Your new energy plan
We'll set you up on our Deemed prices – this is something we've agreed with Ofgem.
Ofgem’s advice is not to switch, but to wait until we’ve set up your new account. We’ll let you know when your account is all set up, and then you can choose from our great range of energy plans. You’re not tied in, and you can switch from us for free - if we’re not quite right for you.
How do I get in touch?
Our customer service team can only answer general queries about the transfer from Tomato Energy. Once we’ve set up your account number, we'll be able to answer all your individual questions.
We’ve published a list of frequently asked questions below. We’ll keep this list updated regularly. This is the same information that our customer service team will have.
Advice and guidance is also available on the Ofgem website for non-domestic customers.
Frequently asked questions
Last updated 11 November 2025
What's happening to my energy supply?
Why has British Gas started supplying my energy?
Tomato Energy have stopped trading and Ofgem have appointed us to be your new energy supplier. You're in safe hands. We'll do everything we can to make this a smooth transfer for you.
Will I lose my gas or electricity supply?
No, your energy supply will continue uninterrupted throughout the transfer process.
When will I join British Gas?
You became a British Gas customer on 9th November 2025 - we’re so pleased to be supplying your business. We'll let you know when your new account is fully set up. This will take between 7 and 21 days.
Do I need to do anything?
When your British Gas account is ready, there are a couple of things we may need you to do:
- Provide a meter reading to get your account started. We'll also pass your reading to Tomato Energy to close their account
- Choose a password for your new online account. We'll send you an email with a link when your online account is ready
Will my account number change?
Yes, your account reference numbers will change – Tomato Energy will close your old account and we’ll set you up with a new one with British Gas.
How do I contact you?
Once we've set up your new British Gas account, we'll be able to help you with any questions about your account. We'll write to let you know when your new account is ready, and how to get in touch with us.
Billing and payments
What will happen to any credit on my Tomato Energy account?
If you have a credit on your account after your final bill, Tomato Energy will transfer it to your British Gas account. You'll see your credit shown on your first British Gas bill.
What if I have outstanding payments or debts with Tomato Energy?
We’re working closely with the relevant parties to confirm how any outstanding balances will be handled. It may take a few weeks for the process to be agreed. Once this is finalised, either we or the appointed administrator will contact you with the next steps.
Will my energy prices change?
Yes, when we set up your new account you’ll be on our “deemed” prices. This means you are free to switch at any time. However, you’ll be able to choose from our full range of great priced energy plans.
What should I do with my Direct Debit?
If you pay by Direct Debit, please don’t cancel it. We'll transfer your Direct Debit to your new British Gas account for you. The only difference is that it will say 'British Gas Business' on your bank/building society statement.
If you don't pay by Direct Debit but would like to, you'll shortly be able to set up a Direct Debit through your online account. We'll be in touch when this is ready for you.
Who should I pay for the energy I use?
If you pay by Direct Debit, please don’t cancel it.
If you've been paying for your energy through a third party, you don't need to do anything. We'll work with them over the next few weeks and take care of everything for you.
Switching
I'm about to move out of my business premises, how do I close my account?
We'll need to set you up on our system before we can close your account and send you a final bill. Once everything is set up, we'll write to you with details of your British Gas account and how to let us know about your move.
If you've already moved, and we've not be in touch with you yet, please contact Tomato Energy who will close your account and send you a final bill.
I've started switching to another supplier, will my transfer still go ahead?
Yes, your transfer should go ahead as normal, and you'll hear from your new supplier. If not, you can start your switch again five days after your new British Gas account is set up.
There are some circumstances when your switch may not go ahead. This could be because you're in a contract or you have an outstanding balance on your account.
Emergencies
What to do if there’s an emergency with my gas or electric supply?
The National Gas Emergency number is 0800 111 999. Call free if you think you have a gas leak, or you're worried that fumes escaping from a gas appliance contain carbon monoxide.
The electricity emergency number is 105. Call if you have an electrical emergency or a power outage. You'll be put through to your local electricity network operator who can help. It's free from most landlines and mobiles in England, Scotland and Wales.
