Gourmet Burger Kitchen sustainability score: 28/100
Gourmet Burger Kitchen is a UK-based casual dining chain operating approximately 40–60 restaurants focused on premium burgers and fast-casual dining. Founded in 2001 and headquartered in London, GBK is owned by Boparan Restaurant Group, a multi-brand hospitality operator.
More about Gourmet Burger Kitchen
The chain has faced operational contraction post-2020 administration.
Founded 2001Head office London, United KingdomStaff ~1,000Revenue ~£125MWebsite ↗
GBK has published no emissions data since 2021 and relies entirely on offsetting rather than reductions. A beef-heavy restaurant chain with material supply chain emissions claims carbon neutrality through full offset reliance—a documented greenwashing indicator. Zero sustainability governance, no targets, no follow-up disclosure.
Gourmet Burger Kitchen scores 28/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Scores are free. Companies can never pay for anything about their own score. Last verified May 2026.
That places Gourmet Burger Kitchen joint 731st of 934 companies scored, and joint 34th of 51 in Food Service / Restaurants.
Limited evidence. This score rests on 7 sources, 57% of them published by the company itself. Every source cited here passed the same quality checks as any other score: all live, none from data aggregators. There is simply less of it.
What is Gourmet Burger Kitchen doing well, and where does it fall short?
Strongest on Controversies & Red Flags and Energy Source (5/10, 3/10). Weakest on Carbon Footprint: Supply Chain and Emissions Trajectory (1/10, 1/10).
Where Gourmet Burger Kitchen lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations2/10No emissions figures for its own operations, not even an estimate from energy bills.
- Emissions from its supply chain1/10No assessment of where its supply-chain emissions come from.
- Whether its emissions are falling1/10No evidence its emissions are falling, not even from energy bills or mileage.
- How clean its energy is3/10No renewable energy tariff or major efficiency investment shown.
- Its effect on nature2/10No assessment of its effect on nature, and no basic environmental policy.
- How it uses materials and handles waste2/10No active waste reduction, reuse or repair shown.
- Its effect on water2/10No monitoring of water use, or no measures to reduce it.
- Its climate targets1/10No emissions reduction targets.
- How openly it reports1/10No sustainability information published.
- Its record on controversies5/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Gourmet Burger Kitchen's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Gourmet Burger Kitchen's score based on?
7 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
57% of them were published by Gourmet Burger Kitchen itself; the rest come from independent sources.
Scored on 9 April 2026 under an earlier version of our method. We're re-checking it under the current method.
This company's public sustainability disclosure is limited. This score is based on the 7 verified sources cited below, rather than padded to a standard count.
Limited data coverage. This assessment is based on 7 sources, 57% of which are self-reported by the company. Scores may change as independent evidence becomes available.
If you believe a source has been misread or a newer version exists, submit a challenge.
Is this your company? Claim this profile (free)
Use this score in tenders
Send the link, or the one-page score sheet. It links back to this page and every source. Free.
Open the score sheet →Send new evidence, free
Scored low because little is published? Publish what you do and send us the link, free. If it holds up, your score changes, and the change is logged on your page.
How to send evidence →Put your score on your website, free
It shows the current score and links to this page, so it changes when the score does.
Track this score
Bidding for a public contract? Check if you need a Carbon Reduction Plan, free →
Want your own page like this?
Free, independent, every source shown. Send it to any buyer who asks about your sustainability.
How does Gourmet Burger Kitchen compare with other food service / restaurants companies?
Where Gourmet Burger Kitchen sits among food service / restaurants peers.
Among the 51 major food service / restaurants brands we've scored, Gourmet Burger Kitchen is tied =34th of 51, with 3 others.
Who scores higher in Food Service / Restaurants?
The 3 companies in the sector scoring nearest above Gourmet Burger Kitchen.
Taco Bell's sustainability record is weak across climate, plastics, and water.
See the breakdown →TGI Fridays discloses almost nothing on climate or environment.
See the breakdown →The Ivy Collection operates 50 UK restaurants with £327M revenue but discloses no emissions data despite material operational and supply chain footprints estimated at tens of thousands of tonnes CO₂e annually.
See the breakdown →Which companies moved this week, and why.
One email, every Sunday. Score changes, new research, the stories behind the numbers. Free.
We'll send one email to confirm. No spam. Unsubscribe in one click.
Checking a company?
Search free →Asked to prove you're sustainable?
Get your business scored, free →Been scored?
Find your page and claim it, free →Scores are free. Companies can never pay for anything about their own score.