Byron Burger sustainability score: 27/100
Better than 21% of Food Service / Restaurants
Below expectations starts at 31. The highest score on SINK is 71.
Byron Burger is a UK-based casual dining chain specializing in beef burgers, founded in 2007 and headquartered in London. Operating approximately 9–12 sites following multiple restructurings, the company sources grass-fed UK and Irish beef and operates commercial kitchens with significant energy and water use.
More about Byron Burger
Currently owned by Niyamo Capital as of December 2025.
Founded 2007Head office London, UKStaff ~200–400Revenue ~£10–20M (estimated, post-restructuring with ~9–12 sites)Website ↗
Byron Burger publishes no emissions data, targets, or sustainability strategy despite operating a beef-heavy restaurant chain with material operational and supply-chain carbon impact. The company's sole environmental claim—recyclable packaging—is unverified marketing language. Multiple insolvencies and recent ownership change signal financial distress, not environmental commitment.
Byron Burger scores 27/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified May 2026.
That places Byron Burger joint 815th of 1,023 companies scored, and joint 40th of 53 in Food Service / Restaurants.
Limited evidence. This score rests on 6 sources, 17% 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 Byron Burger doing well, and where does it fall short?
Strongest on Controversies & Red Flags and Energy Source (7/10, 2/10). Weakest on Targets & Commitments and Carbon Footprint: Operations (0/10, 1/10).
Where Byron Burger lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Its climate targetsSet emissions reduction targets.
- Emissions from its own operationsPublish emissions figures for its own operations, even an estimate from energy bills.
- Emissions from its supply chainAssess where its supply-chain emissions come from.
Every question that lost points
- Emissions from its own operations1/10No 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 is2/10No 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 targets0/10No emissions reduction targets.
- How openly it reports1/10No sustainability information published.
- Its record on controversies7/10Points 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 Byron Burger's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Byron Burger's score changed?
Byron Burger's score has been reviewed 3 times and currently stands where it started, at 27.
- 27 → 278 November 2026
Source added, 8 November 2026: the company's filed accounts, quoted for its staff numbers and turnover. They confirm it is a small company, so the size rule is unchanged. Score unchanged.
- 27 → 277 November 2026
Correction, 7 November 2026: removed an unsourced emissions figure. Score unchanged.
- Scored 279 April 2026
Initial score at platform launch
What evidence is Byron Burger's score based on?
6 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
17% of them were published by Byron Burger 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 6 verified sources cited below, rather than padded to a standard count.
Limited data coverage. This assessment is based on 6 sources, 17% of which are self-reported by the company. Scores may change as independent evidence becomes available.
“The average monthly number of employees, including the directors, during the year was as follows: … 182 197 … Turnover 4 10,599,485 14,356,487”
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How does Byron Burger compare with other food service / restaurants companies?
Where Byron Burger sits among food service / restaurants peers.
Among the 53 major food service / restaurants brands we've scored, Byron Burger is tied =40th of 53, with 2 others.
Who scores higher in Food Service / Restaurants?
The 3 companies in the sector scoring nearest above Byron Burger.
Bill's Restaurants publishes zero sustainability data across operations, supply chain, energy, waste, water, and targets.
See the breakdown →GBK has published no emissions data since 2021 and relies entirely on offsetting rather than reductions.
See the breakdown →Tim Hortons hides behind parent company RBI's consolidated reporting, obscuring brand-level emissions accountability across 6,043 restaurants.
See the breakdown →Which companies moved this week, and why.
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