Food Service / Restaurants

Byron Burger sustainability score: 27/100

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About Byron Burger

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 ↗

Our verdict

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. Companies can never pay for anything about their own score. Last verified May 2026.

That places Byron Burger joint 759th of 934 companies scored, and joint 38th of 51 in Food Service / Restaurants.

Limited evidence. This score rests on 5 sources, 20% 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.

The ten questions

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).

What's missing

Where Byron Burger lost points

For each question that lost points, the evidence our public rubric looks for that we didn't find.

  • 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.

The calculation

How is Byron Burger's SINK score calculated?

Same ten questions for every company. No private weighting.

SINK = (0.3 × Base + 0.7 × Performance) × Scale
Industry base impact
Food Service / Restaurants sector ceiling.
45 / 100
Performance score
Sum of the ten questions, each scored 0 to 10.
19 / 100
Raw score
Weighted average before scale penalty.
(0.3 × 45) + (0.7 × 19) = 26.8
Scale penalty
Multiplier based on total emissions. Bigger polluters lose more.
× 1
Final score
Rounded. Significant gaps.
27 / 100
Where the evidence comes from

What evidence is Byron Burger's score based on?

5 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.

20% 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 5 verified sources cited below, rather than padded to a standard count.

⚠

Limited data coverage. This assessment is based on 5 sources, 20% of which are self-reported by the company. Scores may change as independent evidence becomes available.

[1]Self-reported
About Us page
Ongoing
Q1Q2Q4Q5Q6Q7Q8Q9Q10
View →
[2]Public record
GBNews: Byron Burger rescue deal collapsed
2025
Q3Q9
View →
[3]Public record
The Caterer: Byron Burger restaurant closures
Unknown
Q3
View →
[4]Third-party verified
SBTi Target Dashboard
Ongoing
Q8
View →
[5]Public record
Wikipedia: Byron Hamburgers
Ongoing
Q10
View →

If you believe a source has been misread or a newer version exists, submit a challenge.

For Byron Burger

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    Byron Burger: SINK sustainability score 27/100.

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Byron Burger in context

How does Byron Burger compare with other food service / restaurants companies?

Where Byron Burger sits among food service / restaurants peers.

Among the 51 major food service / restaurants brands we've scored, Byron Burger is tied =38th of 51, with 2 others.

=38/51
Byron Burger's rank
34
Industry average
19
Industry low
51
Industry high
See all 51 in Food Service / Restaurants →
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