Verified: 10 March 2026 02:25 am UK Time
Industry: Energy Supply & Home Services
Jurisdiction: United Kingdom
Primary Regulator: Ofgem
Important Safety Warning: Beware of fake customer service numbers on search engines. Only use official channels. Scammers frequently buy ads to promote fraudulent phone numbers. British Gas staff will never ask for your account PIN, your online portal password, or ask you to move money to a “safe account” over the phone.
Level 1: Customer Support (Initial Complaint)
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How to complain: You can raise a complaint directly through your online account, via live chat on their website, or by calling their official customer service routing numbers.
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General Enquiries & Complaints: 0330 808 3880
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Gas Emergency (Smell gas?): 0800 111 999
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Electricity Emergency (Power cut?): 105
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Source Verification Note: British Gas Complaints Procedure
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Availability: General telephone support is available Monday to Friday from 8:00 AM to 6:00 PM, and Saturday from 9:00 AM to 2:00 PM (UK Time). The national emergency lines operate 24/7.
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Timeline: British Gas aims to resolve complaints quickly. If they cannot resolve it within 5 working days, they will formally acknowledge it and keep you updated. (Note: Under Ofgem rules, if an engineer misses an appointment or they are late switching your supplier, they must issue automatic compensation credits to your bill).
Level 2: Formal Corporate Escalation (Notice of Dispute)
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Who to contact: If standard customer service cannot resolve the issue, you must formally escalate it to their central correspondence team. Send a written letter detailing your account number, a timeline of the issue, and your desired resolution. You must explicitly request a “Deadlock Letter” if they refuse your proposed resolution. Sending this via Royal Mail Signed For is highly recommended to prove receipt.
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Complaints Address: British Gas Complaints, PO Box 226, Rotherham, S98 1PB
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Timeline: Under Ofgem regulations, British Gas has a maximum of 8 weeks to issue a final resolution or a Deadlock Letter.
Level 3: Regulatory Authority (Government Ombudsman)
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Authority: The Energy Ombudsman
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Portal/Contact: The Energy Ombudsman is the Ofgem-approved, free dispute resolution service for British Gas complaints. You can submit a complaint online or by phone:
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Website: energyombudsman.org
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Email: enquiry@energyombudsman.org
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Phone: 0330 440 1624
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Timeline (CRITICAL): You can only refer your complaint to the Ombudsman after you receive a Deadlock Letter from British Gas, OR if 8 weeks have passed since your initial formal complaint without a resolution. You must escalate the complaint to the Ombudsman within 12 months of receiving your Deadlock Letter.
Level 4: Legal Action (Final Step)
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Pre-Litigation: Before commencing legal proceedings, UK legal protocols require you to send a formal “Letter Before Action” (LBA) to Centrica’s corporate legal headquarters. This letter must outline your claim, the exact legal or contractual breach, the evidence, and the financial remedy you seek, giving them a final 14 to 30 days to settle. You must address it to the correct legal entity:
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Legal Address (Energy Supply/Bills): British Gas Trading Limited, Millstream, Maidenhead Road, Windsor, Berkshire, SL4 5GD
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Legal Address (Boiler Repairs/HomeCare): British Gas Services Limited, Millstream, Maidenhead Road, Windsor, Berkshire, SL4 5GD
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Court: If the LBA fails and the Ombudsman cannot resolve it, you can file a lawsuit. For financial claims up to £10,000 in England and Wales, you can use the Money Claim Online (MCOL) portal to enter the Small Claims Track. For complex claims, you will likely need to instruct a solicitor and proceed to the County Court.
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Source Verification: Make a court claim for money (GOV.UK)
Community Action: Is British Gas still ignoring your overcharging issue or broken boiler dispute? Reply below (do not share your passwords, full account numbers, or PINs), and our community will point you to the right Energy Ombudsman complaint templates!