Nattergal sustainability score: 40/100
Nattergal is a UK-based ecosystem restoration company founded in 2021, operating three major rewilding sites: Boothby Wildland (617 ha), High Fen (292 ha), and Harold's Park. It restores degraded farmland to biodiverse habitats, manages biodiversity net gain (BNG) credits, and holds a 30-year Landscape Recovery agreement with Defra.
More about Nattergal
The company generates revenue from habitat banking, organic meat sales, and property rental.
Founded 2021Head office United KingdomStaff ~23 (2025)Revenue Not disclosed (income statement not delivered under s444, FY ended 31 Dec 2025)Website ↗
Nattergal operates rewilding sites across more than 1,000 hectares. It publishes a combined TCFD and TNFD report, but we could not read the report's emissions figures, so no emissions figure is used here. Its filed accounts have no income statement. Its biodiversity figures are self-reported, and its land restoration commitments are contractual and long-term.
Nattergal scores 40/100 (Below expectations) 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 November 2026.
That places Nattergal joint 422nd of 986 companies scored, and 3rd of 3 in Rewilding / Ecosystem Restoration.
What is Nattergal doing well, and where does it fall short?
Strongest on Nature & Biodiversity Impact and Controversies & Red Flags (8/10, 7/10). Weakest on Carbon Footprint: Supply Chain and Emissions Trajectory (2/10, 2/10).
Where Nattergal lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations3/10No emissions figures for its own operations, not even an estimate from energy bills.
- Emissions from its supply chain2/10No assessment of where its supply-chain emissions come from.
- Whether its emissions are falling2/10No 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 nature8/10No measurable net gain for nature.
- How it uses materials and handles waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water6/10No water stewardship programme or verified fall in water use.
- Its climate targets6/10Its targets aren't validated by the Science Based Targets initiative.
- How openly it reports6/10No annual impact report, or no pay linked to climate targets.
- 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 Nattergal's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Nattergal's score based on?
16 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
38% of them were published by Nattergal itself; the rest come from independent sources.
10 of 16 sources are independent of the company.
“The focus of this initial combined TCFD and TNFD report – on our 2024 reporting year”
“completed the installation of over 6,000m of bespoke fencing”
“Installing sub-surface bunds lined with clay at strategic positions across the site”
“The average number of employees during the year was 23”
“In October 2024 we announced that we had raised £40m of equity funding as part of our seed round”
“The 617-hectare site has recorded a 108% increase in biodiversity”
“The Council, as the Local Planning Authority therefore has monitoring and enforcement responsibilities in relation to the use of the land for providing BNG units.”
“Using landscape biodiversity metrics to assess rewilding: A comparison of the Knepp Estate and an agricultural baseline at Boothby Wildland”
“but this may be at the detriment of others such as ground nesting birds”
“The pork, beef and venison produced go into the local food system”
“such as organic meat sales and property rentals”
“Step into our Wildlands, whether you're visiting yourself or bringing a team or group.”
“the report was led by the Countryside and Community Research Institute (CCRI) at the University of Gloucestershire and the Leverhulme Centre for Nature Recovery”
“House builders are effectively paying an extra biodiversity tax, which inevitably gets passed on to house buyers.”
“Anna Taylor, director of CPRE London said this was an exciting plan which offered a blueprint for how depleted land could be transformed”
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How does Nattergal compare with other rewilding / ecosystem restoration companies?
Nattergal sits at the bottom of the rewilding / ecosystem restoration pack.
Among the 3 major rewilding / ecosystem restoration brands we've scored, Nattergal sits 3rd of 3.
Who scores higher in Rewilding / Ecosystem Restoration?
The 2 companies in the sector scoring nearest above Nattergal.
Mossy Earth is a small, bootstrapped rewilding platform with negligible operational emissions and a core mission delivering genuine biodiversity restoration across 500+ hectares.
See the breakdown →Ecosulis designs and delivers habitat restoration for clients across the UK.
See the breakdown →Which companies moved this week, and why.
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