Gourmet Burger Kitchen is a UK-based casual dining chain operating approximately 40–60 restaurants focused on premium burgers and fast-casual dining.
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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. Fees pay for the review, never the result. Last verified May 2026.
That places Gourmet Burger Kitchen joint 658th of 847 companies scored, and joint 35th of 49 in Food Service / Restaurants.
Where Gourmet Burger Kitchen sits among food service / restaurants peers.
Among the 49 major food service / restaurants brands we've scored, Gourmet Burger Kitchen is tied =35th of 49, with 3 others.
Its three lowest-scoring questions, and what the evidence didn't show.
No supplier mapping, engagement programme, or assessment.
No multi-year emissions data 2022–present.
No SBTi commitment or validation.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →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).
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 →The formula and all 7 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale7 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
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.
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. The chain has faced operational contraction post-2020 administration.
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