Talan UK & Ireland sustainability score: 32/100
Talan UK & Ireland is a London-based consultancy advising on energy, low-carbon, cyber and privacy, the UK and Irish arm of the French consultancy group Talan; its largest clients include energy-industry bodies and the Department for Energy Security and Net Zero. Talan UK & Ireland Limited was incorporated in 2002 and was called Gemserv until 2025.
More about Talan UK & Ireland
It had 212 employees and £27.0 million revenue in 2025.
Founded 2002Head office London, UKStaff ~212 (2025 average)Revenue ~£27.0M revenue (2025)Website ↗
Talan UK & Ireland reports 358 tCO2e for 2025, above its 2019/20 baseline, but its supply-chain figure leaves out the goods and services it buys, and its business travel emissions rose sharply. Its net-zero-by-2040 targets are per employee and not SBTi-aligned, and its 'carbon neutral' claim rests on avoidance credits. It publishes no renewable electricity, water or waste data.
Talan UK & Ireland scores 32/100 (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 Talan UK & Ireland joint 620th of 934 companies scored, and 27th of 29 in Consulting / Professional Services.
What is Talan UK & Ireland doing well, and where does it fall short?
Strongest on Controversies & Red Flags and Carbon Footprint: Operations (8/10, 5/10). Weakest on Emissions Trajectory and Energy Source (2/10, 2/10).
Where Talan UK & Ireland lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations5/10No full Scope 1 and 2 figures worked out to the GHG Protocol.
- Emissions from its supply chain4/10Most of its supply-chain (Scope 3) emissions aren't measured.
- 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 nature3/10No assessment of its effect on nature, and no basic environmental policy.
- How it uses materials and handles waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water3/10No monitoring of water use, or no measures to reduce it.
- Its climate targets3/10No specific targets with dates.
- How openly it reports5/10No dedicated sustainability role, board oversight or public report.
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 Talan UK & Ireland's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Talan UK & Ireland's score based on?
10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
30% of them were published by Talan UK & Ireland itself; the rest come from independent sources.
Talan UK & Ireland reports 357.6 tCO2e for 2025, but by its own account its supply-chain (Scope 3) figure is only the 'required subset' for UK government contracts and leaves out the goods and services it buys (Scope 3 category 1). So the total is not used to set the size deduction, and the deduction for an incomplete footprint (0.70x) applies.
“Scope 2 emissions are composed exclusively of electricity consumption.”
“it qualifies as a low energy user”
“qualifies as a low energy user under these regulations”
“For clarity this Carbon Reduction Plan refers only to the Talan UK & Ireland Limited entity and not the whole of the Talan Group.”
“The certification includes all Talan brands in the UK and Ireland.”
“The Gemserv brand will be retired, as the consultancy adopts the corporate identity of its parent company Talan.”
“Professional services firm Gemserv has acquired Ecuity Advisory as part of its drive to expand services for clients seeking to accelerate the transition to net zero.”
“Through the acquisition, Talan is set to double its scale of UK operations”
“Group of companies accounts made up to 31 December 2025”
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How does Talan UK & Ireland compare with other consulting / professional services companies?
Where Talan UK & Ireland sits among consulting / professional services peers.
Among the 29 major consulting / professional services brands we've scored, Talan UK & Ireland sits 27th of 29.
Who scores higher in Consulting / Professional Services?
The 3 companies in the sector scoring nearest above Talan UK & Ireland.
Intertek has met its near-term SBTi emissions targets early with verified 54.7% absolute reductions in Scope 1+2 by 2025.
See the breakdown →Brabners reports its own operations' emissions and business travel, 177 tCO2e in its year to April 2025, down from 263 t in 2021, but no other supply-chain emissions.
See the breakdown →LCP reports only its own operations' emissions and car travel, 130 tCO2e in its 2025/26 year, and leaves the rest of its supply chain 'not quantified'.
See the breakdown →Which companies moved this week, and why.
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