The UK CMA found AWS and Microsoft hold significant market power in UK cloud and identified egress fees, interoperability barriers and Microsoft software licensing as constraints on switching and multi-cloud.

SocioLens project,

Claim LD11-HQ-C08 (v1.0)

Research opportunities this claim motivates

What this claim leaves open for research. Each is a hypothesis about a gap, not a finding.

Did UK public bodies switch cloud providers after egress fees were waived?The CMA identified egress fees, interoperability barriers and Microsoft licensing as constraints on switching; the claim does not license "solved switching", and measured post-action switching is named as what would change it.
Do AI startups backed by a cloud giant end up running on that giant's cloud?The CMA found switching constraints in cloud generally, but the claim explicitly does not license AI-specific foreclosure; that is the gap being measured.

Provenance and status

Claim type: Fact
Publication status: Eligible for publication
Verification state: Checked against the primary source. Who checked this claim is not recorded for it; claim checks so far were AI-led, and no person has checked claims against their sources.
Does not license: Unlawful conduct, solved switching, or AI-specific foreclosure
Limitations: UK-specific; effects of 2026 actions not yet measured
Source (as cited): UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025; March 2026 follow-up
Source type: Regulator document (recorded as “Regulatory primary”)
Institutional position: Government regulator
Maturity of the evidence: Rapidly maturing evidence
Recorded date: 25 September 2026
Currentness / correction: This is the current version. No correction or concern is recorded on its sources.

Sources this version cites

UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025 (Regulator document)
Read the original
CMA package of actions, 31 March 2026 (Regulator document)
Read the original

Version

This is the current version, v1.0. Earlier versions stay available, and their records never change.

Versions: v1.0 · current

Raw record: every recorded field, with its coded values

All 25 canonical Claim fields, verbatim, with the coded values derived from them. The plain-language labels above are read from these.

Claim type (coded): FACT (as printed: “FACT”)
Publication status (coded): ELIGIBLE (as printed: “ELIGIBLE”)
Verification state (coded): CONTENT_VERIFIED_PRIMARY
Source type (coded): REGULATOR_PRIMARY
Maturity (coded): RAPIDLY_MATURING

#	Canonical field	Canonical value (verbatim)	Normalized (Claim Value Vocabulary v1.0.2)
1	CLAIM ID	LD11-HQ-C08	—
2	PUBLIC-FACING CLAIM	The UK CMA found AWS and Microsoft hold significant market power in UK cloud and identified egress fees, interoperability barriers and Microsoft software licensing as constraints on switching and multi-cloud.	—
3	CLAIM TYPE	FACT	base_types: FACT
4	RESEARCH STRAND	B/E — Cloud power and distribution	—
5	MATURITY	RAPIDLY MATURING	states: RAPIDLY_MATURING
6	SOURCE	UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025; March 2026 follow-up	source_ids: SRC-LD11-UK-CMA-CLOUD-FINAL-DECISION-2025, SRC-LD11-UK-CMA-CLOUD-ACTIONS-2026-03
7	SOURCE TYPE	Regulatory primary	classes: REGULATOR_PRIMARY
8	INSTITUTIONAL POSITION	Government regulator	—
9	SCOPE	UK cloud infrastructure services; 2025–2026	—
10	DESIGN	Competition market investigation	—
11	SAMPLE / DATASET	CMA evidence record	—
12	MODEL / TOOL / VERSION	n.a.	—
13	COMPARATOR	Other cloud providers	—
14	MAIN RESULT	Significant market power and specific switching mechanisms identified; later firm actions remain under review	—
15	INFERENTIAL TARGET	Mechanisms translating concentration into bargaining power	—
16	DOES NOT LICENSE	Unlawful conduct, solved switching, or AI-specific foreclosure	—
17	VERIFICATION STATE	CONTENT VERIFIED	state: CONTENT_VERIFIED_PRIMARY · verified_by: UNKNOWN
18	LIMITATIONS	UK-specific; effects of 2026 actions not yet measured	—
19	CONTRADICTORY / SUPPORTING SOURCES	Consistent with EU preliminary cloud concerns	—
20	GEOGRAPHY / LANGUAGE	UK / English	—
21	DISTRIBUTIONAL LEDGER	Business and public-sector users face switching/interoperability constraints	—
22	R01 / FIELD-MAP LINKS	D1, D5, D6, LD-11, LD-12	—
23	WHAT WOULD CHANGE THIS CLAIM?	Measured post-action switching outcomes or changed CMA conclusion	—
24	PUBLICATION STATUS	ELIGIBLE	state: ELIGIBLE
25	RECORDED DATE	2026-09-25	—

Field 22 references resolved against Field Map v0.2: D1 (DOMAIN); D5 (DOMAIN); D6 (DOMAIN); LD-11 (LIVING_DEBATE); LD-12 (LIVING_DEBATE)

The sources as recorded, with their record IDs and coded source types:

Pinned Sources (field 6, version-specific)

“UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025” → UK CMA Cloud Services Market Investigation, final decision… (SRC-LD11-UK-CMA-CLOUD-FINAL-DECISION-2025--v1.0) — UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025; class REGULATOR_PRIMARY (explicit public provenance pin)
“March 2026 follow-up” → CMA package of actions, 31 March 2026 (SRC-LD11-UK-CMA-CLOUD-ACTIONS-2026-03--v1.0) — CMA package of actions, 31 March 2026; class REGULATOR_PRIMARY (explicit public provenance pin)

Cited by Living Debate versions

Concentration, Stack & Sovereignty (v0.1) LD-11

Cite this page

SocioLens project. (2026, September 25). The UK CMA found AWS and Microsoft hold significant market power in UK cloud and identified egress fees, interoperability barriers and Microsoft software licensing as constraints on switching and multi-cloud [Claim LD11-HQ-C08, version v1.0]. SocioLens. https://sociolens-web.pages.dev/claims/ld11-hq-c08/v1.0/

@misc{sociolens_ld11_hq_c08_v1_0,
  author = {{SocioLens project}},
  title = {The UK CMA found AWS and Microsoft hold significant market power in UK cloud and identified egress fees, interoperability barriers and Microsoft software licensing as constraints on switching and multi-cloud.},
  year = {2026},
  date = {2026-09-25},
  howpublished = {\url{https://sociolens-web.pages.dev/claims/ld11-hq-c08/v1.0/}},
  note = {Claim LD11-HQ-C08, version v1.0}
}

The link points to this version, whose record never changes. For a finding, cite the original study as well: SocioLens summarizes research and does not replace it.

Research-of-record provenance

Materialized by sociolens-materializer 0.6.0 at 2026-09-28T20:00:00.000Z; normalization contract SocioLens — Claim Value Vocabulary v1.0.2 — Pre-Spike Materialization Contract (v1.0.2). Content seal SHA-256 61ea0c1633726d277758feb9fa796b319ac87f8d61a27143e26929ff6161c398.

Frozen Drive-derived inputs

R06 — LD-11 Canonical Claim Ledger v1.0 — LOCKED (v1.0) — Drive ID 1Ff_IzUBMpax35rKovu0vxXr1WTtpfCDP; revision: NOT_EXPOSED_BY_DRIVE_TEXT_EXPORT; Drive modified ; block “ENTRY 08 — LD11-HQ-C08 ” SHA-256 02fff84b09df3c9379b0ed300303ccb27e35d4830428c1ab578c6c673de77ab5; SocioLens — Programme Status & Authority Register v0.6 status “CURRENT.”; frozen fixture fixtures/frozen/r06-ld11-claim-ledger-v1.0.

Builder decisions (not Drive data)

VERSION = v1.0 — basis: Claim version taken from the canonical ledger artifact version (R06 — LD-11 Canonical Claim Ledger v1.0); Implementation Architecture Selection §5
CURRENT_POINTER = true — basis: SocioLens — Programme Status & Authority Register v0.6 status for "R06 — LD-11 Canonical Claim Ledger v1.0 — LOCKED": "CURRENT."
FIELD_6_SOURCE_REFERENCE = SRC-LD11-UK-CMA-CLOUD-FINAL-DECISION-2025--v1.0 — basis: field 6 of ENTRY 08 — LD11-HQ-C08 cites "UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025"; the frozen field-6 segment of this ClaimVersion's ledger block; Drive-derived identity authority (Issue #41 Source inventory): Batch 02 §2; ledger C08 fields 6/7/8; KEY EVIDENCE.
FIELD_6_SOURCE_REFERENCE = SRC-LD11-UK-CMA-CLOUD-ACTIONS-2026-03--v1.0 — basis: field 6 of ENTRY 08 — LD11-HQ-C08 cites "March 2026 follow-up"; the frozen field-6 segment of this ClaimVersion's ledger block; Drive-derived identity authority (Issue #41 Source inventory): Batch 02 §2; ledger C08 fields 6/7/8.
SOURCE_PROVENANCE_PIN = SRC-LD11-UK-CMA-CLOUD-FINAL-DECISION-2025--v1.0 — basis: Issue #5 proof rendering (Architecture Proof Protocol v0.1 AP-08 / Amendment v1.2 §6): explicit version-pinned public provenance of this ClaimVersion — the pinned field-6 Source record "UK CMA Cloud Services Market Investigation, final decision 31 Jul 2025"; Drive-derived identity authority (Issue #41 Source inventory): Batch 02 §2; ledger C08 fields 6/7/8; KEY EVIDENCE.
SOURCE_PROVENANCE_PIN = SRC-LD11-UK-CMA-CLOUD-ACTIONS-2026-03--v1.0 — basis: Issue #5 proof rendering (Architecture Proof Protocol v0.1 AP-08 / Amendment v1.2 §6): explicit version-pinned public provenance of this ClaimVersion — the pinned field-6 Source record "March 2026 follow-up"; Drive-derived identity authority (Issue #41 Source inventory): Batch 02 §2; ledger C08 fields 6/7/8.