Three UK

◌ Pending Review

📱 TelecommunicationsGBBelow expectations

~4,500 employees~£2.59B revenueRanked #125 of 323Website ↗

Three UK is a telecommunications company headquartered in GB. Based on our 10-question rubric, Three UK scores 41/100 — rated as below expectations on sustainability for a company of its size and profile.

SINK Score Breakdown

How we calculated Three UK's score using our formula: (0.3 × Base + 0.7 × Performance) × Scale Penalty

Base Impact

Telecommunications industry ceiling

Performance

48/100

10 questions scored below

Scale Penalty

0.82x

emissions volume multiplier

SINK Score

(0.3 × 55 + 0.7 × 48) × 0.82 = 41

10-Question Rubric Breakdown

Click any question to see the reasoning, sources and community challenges.

4/10

Carbon Footprint — Operations

5/10

Carbon Footprint — Supply Chain

4/10

Emissions Trajectory

7/10

Energy Source

2/10

Nature & Biodiversity Impact

4/10

Resource Use & Waste

3/10

Water Impact

7/10

Targets & Commitments

4/10

Transparency & Accountability

Q10

8/10

Controversies & Red Flags

Community Verification

0 verifications · 0 challenges · Scored using SINK editorial review

Last scored: 4 Apr 2026

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