TL;DR
- British Gas scored 2.85 out of 5 in the Q4 2025 Citizens Advice supplier rating, the lowest among the Big Six legacy suppliers and well below the sector leaders.
- Complaint volumes per 10,000 customers ran at the highest level in the sector across 2024-25, driven by smart meter install issues, direct debit disputes, and lingering force-fit PPM compensation cases.
- The internal complaint route runs from frontline contact to the Customer Resolution team. A deadlock letter or 8 weeks unresolved unlocks the Energy Ombudsman.
- Ombudsman case volumes against British Gas have averaged around 5,000 per quarter through 2025. Typical awards: financial correction plus £50 to £200 goodwill.
- For PPM force-fit cases from 2022-23, customers can still claim under the British Gas-specific compensation scheme launched in October 2023.
Last reviewed: May 2026
British Gas is the largest UK retail energy supplier by customer count and consistently has the highest complaint volumes in absolute and per-customer terms. The internal complaint process is competent on average but inconsistent at the edges. Customers who escalate strategically tend to get faster resolution; customers who stay on the phone with the frontline often do not. Knowing the route matters.
Where British Gas complaints come from
The Q4 2025 Citizens Advice supplier rating put British Gas on 2.85 out of 5. The complaint volume per 10,000 customers ran at around 90 per quarter through 2025, the highest among major suppliers and roughly four times the figure at Octopus.
The dominant themes for 2025-26 cluster in five areas. Smart meter install delays beyond the published lead time, which account for around 25% of complaints. Direct debit calculations and disputed increases, around 20%. PPM-related issues including legacy meters and historical force-fit cases, around 15%. Billing accuracy after switch or move-in, around 15%. Customer service responsiveness, around 10%. The remaining 15% spreads across boiler service issues (where customers also have HomeCare), tariff move errors, and energy debt collection.
The PPM force-fit complaints from 2022-23 still surface in 2026 because some affected customers only recently became aware of the compensation scheme. British Gas opened a dedicated claim route in October 2023 and continues to accept submissions.
Channel choice is the single biggest factor in resolution speed.
The first move: pick the right route
British Gas runs four main customer service channels: phone, online chat, email, and postal letter. Phone hold times peak between 9am and 11am Monday and Tuesday; the calmest windows are early afternoon and Saturday morning.
Online chat reaches an agent faster than the phone in most cases and produces a transcript by default. Email is slower (typically 5 working days for a first response) but provides a written record. Letters are slow (7 to 14 days) but useful for documenting a complaint formally.
The most effective opening move is online chat with a clear summary of the issue, followed up by email confirming the conversation. The chat-plus-email combination produces both speed and paper trail. Customers who only call the phone line tend to have to re-explain the issue each time the case is picked up by a different agent.
Internal escalation and the Customer Resolution team
If the first-line response does not resolve the issue, customers can ask for the case to be escalated. The internal team is called the Customer Resolution team. They have the authority to issue goodwill payments, override automated direct debit changes, correct billing errors, and arrange engineer or meter work with priority.
Reaching the team requires either explicit escalation request in the chat thread or asking the agent to transfer the call. Some agents will resist transferring if they believe they can resolve at the frontline; the customer should be polite but firm if escalation is needed.
The team's published target is to respond within 5 working days. Most cases close within 10 working days of being raised with the team.
Where it breaks: cases involving the Centrica back-office systems (smart meter data flows, debt management, prepayment migrations) can take longer because the customer-facing team relies on internal data teams. The customer should ask for a named case handler and a target resolution date in the first escalation contact.
The deadlock letter
If escalation does not resolve, British Gas can issue a deadlock letter. The letter formally records that internal routes are exhausted and the customer can refer to the Energy Ombudsman. Customers can also refer after 8 weeks without a deadlock letter, under the standard Ofgem licence condition.
Customers should ask explicitly for a deadlock letter when the case is genuinely stuck. The supplier sometimes delays the letter because it triggers Ombudsman handling fees. The letter is a customer right and Ofgem expects suppliers to issue it without unreasonable delay.
The deadlock letter is not a defeat. It is the document that opens the next stage. Customers who receive one should keep it filed and use it when submitting to the Ombudsman.
Submitting to the Energy Ombudsman
The Energy Ombudsman is the independent dispute resolution body. Submission is free. The case is filed online with the deadlock letter or evidence of 8 weeks elapsed since complaint. The Ombudsman validates, investigates, and decides within 6 to 10 weeks.
| Outcome category | Typical award range at British Gas cases | Note |
|---|---|---|
| Billing correction | Variable | Refund of overpaid amounts; rebilling at correct rate |
| Goodwill / inconvenience | £50 to £200 | Higher than sector average due to complaint complexity |
| Distress / vulnerable customer | £100 to £500 | Reserved for serious cases; PPM force-fit cases often in this range |
| Process change | Non-monetary | Where the Ombudsman directs an internal process update |
British Gas implements Ombudsman decisions within the required 28 days in most cases. Delays past 28 days are themselves a referrable issue.
The PPM force-fit compensation route
British Gas launched a dedicated compensation scheme in October 2023 for customers affected by the 2022-23 force-fit episode. Claims can be submitted by anyone who had a PPM force-fitted by British Gas or its contractors between October 2021 and February 2023, particularly customers on the Priority Services Register or with documented vulnerabilities.
The compensation is typically £250 plus a refund of any unfair charges incurred during the PPM period. Customers can also request a free switch back to a credit meter as part of the settlement.
This scheme runs parallel to the standard complaint and Ombudsman routes. A customer can submit a force-fit claim and a regular complaint about a different issue without the two interfering.
Guaranteed Standards of Performance
Ofgem's automatic compensation system pays out for specific failures: missed appointments, late switch refunds, supply restoration delays. The current rates, set in April 2024 and unchanged in the May 2026 review, sit around £30 per failure.
British Gas's record on automatic GSOP payouts has been weaker than the sector average. Customers who experience a missed appointment or other GSOP-triggering event should raise it specifically as a GSOP item in the complaint thread. The payment is non-discretionary if the trigger condition was met.
Multiple GSOP failures can accumulate. A customer who experienced three missed appointments and a late refund could be due over £100 in automatic GSOP payments before any goodwill payment for inconvenience.
Practical advice for any British Gas complaint
In practice, the cases that resolve fastest are the ones with a clear paper trail: dates, meter readings, and the words "this is a formal complaint" in the first message.
Use written channels where possible. Chat plus email produces the strongest paper trail. Phone calls should be followed by a confirmation email summarising the conversation.
Note every interaction with date and reference number. The Ombudsman case is built from this record. Customers who keep good logs win more often.
Ask for a named case handler at escalation. British Gas does not always assign one by default. Having one named person to chase improves response time.
Be specific about the remedy sought. "Refund of £X for the period Y to Z plus a goodwill payment for time taken" is actionable. Vague requests get vague responses.
If the issue involves a vulnerable customer (PSR, elderly, medical equipment dependent), say so in the first message. British Gas's vulnerability handling is extensive when triggered but does not always activate automatically.
Specific tactics for the most common complaint categories
The complaint categories at British Gas cluster in predictable ways. Each has a specific tactical approach that resolves cases faster than the generic complaint process.
Direct debit disputes: request the consumption assumptions in writing, provide a counter-projection based on actual readings, ask for a manual override at a customer-proposed amount. This works because the underlying issue is usually an algorithm projection rather than a fundamental disagreement.
Smart meter install delays past 12 weeks: escalate to the Customer Resolution team with a specific written timeline request. The supplier can re-prioritise the booking when pressed; the publicly published lead time is the target, not a maximum.
Billing accuracy after switch or move-in: provide dated photo readings of the meter at the switch date or move-in date. The supplier accepts these as evidence and can rebill from the actual reading. Without photo evidence the customer is reliant on the supplier's estimate.
PPM force-fit historical claims: submit through the dedicated claims page launched October 2023. This route is separate from the standard complaint process and produces faster resolution for in-scope cases.
HomeCare boiler service or repair disputes: HomeCare complaints route through a separate team rather than energy customer service. The customer should ask explicitly for HomeCare escalation to avoid being routed to the energy queue.
Editorial disclaimer. Kaeltripton is an independent UK finance publisher. This article is general information for UK adults making their own decisions, not regulated financial advice. Complaint processes, compensation thresholds, and Ombudsman timelines change. Figures reflect British Gas, Ofgem, Citizens Advice, and Energy Ombudsman publications dated before the last-reviewed date at the top of this page. For complaints, refunds, or vulnerable-customer protection the formal route runs through the supplier first and then the Energy Ombudsman.
FAQ
How long before a case can go to the Ombudsman?
Eight weeks from the first written complaint, or earlier if British Gas issues a deadlock letter.
What is the typical Ombudsman award against British Gas?
The median goodwill award is around £100, plus any required billing correction. PPM force-fit cases attract higher awards, frequently in the £250 to £500 range.
Are former customers eligible for the PPM force-fit scheme?
Yes. The scheme accepts claims regardless of current supply status. Submission is through the British Gas dedicated claims page.
Is supply affected by complaining?
No. Supply is not affected by a complaint. The tariff continues unchanged.
How long does British Gas take to implement an Ombudsman decision?
Within 28 days, as required by Ofgem licence condition. Delays past 28 days can themselves be raised as a separate issue.
Should the CEO email be copied in for serious cases?
The CEO escalation route exists but is no longer a fast track. The Customer Resolution team has more authority and faster turnaround on most issues.