1001 Smart Cities
🇬🇧 London

London Datastore & Data for London Library

🤖 AI-generated summary · ◆ 13 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

13 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

One of the world's earliest municipal open-data portals opened in 2010 and is still running. Its 2025 successor stopped collecting: it links roughly 5,100 datasets that stay with TfL, the ONS and the boroughs — under no single licence.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byGreater London Authority (Data for London)
Scale🏙️ City-wide
FundingGLA; early development supported by Bloomberg Philanthropies

Part of 1001 Smart Cities — 1,216 documented projects · 🏙️ 15 more in London · 📊 Open data guide · 📡 Data & IoT projects

The Greater London Authority opened the London Datastore in 2010, one of the world's earliest municipal open-data portals; it still publishes over a thousand datasets. On 8 July 2025 the Mayor launched the Data for London Library, which links datasets held by Transport for London, the ONS, DHSC and four boroughs rather than collecting them — roughly 5,100 at launch, 20,000 by the GLA's count in September 2026. Licences are not set catalogue-wide: the GLA says conditions vary for each data package, and sampled datasets carry Open Government Licence v2 or no licence title at all. The Datastore remains live while further modules of the Data for London programme are built; the Library is the first.

Live 📅 since 2010

📊 Impact

The GLA reports uses rather than measured outcomes: Datastore data feeds London's air-pollution alerts, the London Building Stock Model that helps councils prioritise homes for retrofit, and quarterly CHAIN reports on rough sleeping. Catalogue counts are operator-reported — the Datastore's API listed 1,305 datasets on 5 October 2026 — and measure supply, not use.

🎓 Lesson

A catalogue that federates rather than collects inherits its partners' licence terms: discovery improves, reusability does not.

📡 Data & IoTOpen dataDigital government

Sources

↗ Mayor of London — launch of Data for London Library (press release)Published 8 July 2025Official primary: 8 July 2025 launch, ~5,100 linked datasets, partners. london.gov.uk blocks automated fetch (403) — figures confirmed instead via independent trade press below.
↗ Data for London / London Datastore (live platform)Fetched 2026-08-06: 'over a thousand datasets'; verbatim on the successor — 'While further modules are developed, the London Datastore will remain, as ever, a trusted data resource for you to use.'
↗ London Datastore — Frequently Asked Questions (licensing)Verbatim: 'The license conditions under which data can be used will vary for each data package' and 'It is the responsibility of the user to adhere to the individual license conditions.' No catalogue-wide licence instrument.
↗ London Datastore CKAN API — package_searchPrimary count: 1,301 datasets on 2026-08-06. Caution: the façade ignores q/rows/facet.field — a control query for a nonexistent licence returned the same 1301, so per-licence counts CANNOT be derived here. Sampled datasets show license_id null throughout; 2 of 5 titled 'Open Government Licence v2', 3 of 5 empty.
↗ THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)Independent press: launch date, 5,100+ datasets, 'connect, not collect' wording, partner list, 'It replaces the London Datastore, which was first launched in 2010.'
Show 3 more sourcesShow fewer
↗ GLA Chief Digital Officer — Introducing the Data for London LibraryPublished 15 July 2025Official GLA blog (published 15 July 2025, after the 8 July launch): '5,000+ datasets — more than triple the number available on the existing London Datastore'; beta status; Bloomberg Philanthropies supported the early development phase.
↗ GLA Chief Digital Officer — London's city innovation stack (25 Sep 2026)GLA Chief Digital Officer: the Data for London Library now connects 20,000 urban datasets.
↗ Mayor of London — London Datastore marks 10 years (press release, 8 Jan 2020)Ten-year mark: around 60,000 users a month and more than 6,000 datasets, up from around 500 at the 2010 launch; ODI report on the Datastore's future.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2010. 5 of 8 sources carry a publication date, from 8 January 2020 to 25 September 2026.

When the sources were published

  1. Mayor of London — London Datastore marks 10 years (press release, 8 Jan 2020)
  2. Greater London Authority · regional governmentMayor of London — launch of Data for London Library (press release)
  3. Think Digital Partners · pressTHINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)
  4. Greater London Authority — Chief Digital Officer · regional governmentGLA Chief Digital Officer — Introducing the Data for London Library
  5. GLA Chief Digital Officer — London's city innovation stack (25 Sep 2026)

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 13 claims with their sources · the forensic record

Evidence file · public beta 13 addressable claims, 8 source dossiers, one permanent baseline. The file is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 13

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-4caa8e111bdefbb5 quantitative
The Greater London Authority opened the London Datastore in 2010
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The Mayor's press release: the London Datastore "was first launched in 2010"; THINK Digital Partners repeats it.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
  2. THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)
Claim 2 clm-26b2d9aa0512c4d2 descriptive
one of the world's earliest municipal open-data portals
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The press release says the Datastore "at the time was one of the world's earliest and most innovative open data platforms".
Caveat
The GLA's own description of its platform.

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
Claim 3 clm-4189993d9f3022a7 quantitative
it still publishes over a thousand datasets
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The live Datastore home page: the site "provides over a thousand datasets to help you understand the city".
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Data for London / London Datastore (live platform)
Claim 4 clm-a6b01bc4901b55d5 quantitative
On 8 July 2025 the Mayor launched the Data for London Library
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The Mayor's press release, dated 8 July 2025, announces that Sadiq Khan "has launched the Data for London Library"; THINK Digital Partners reported it the same day.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
  2. THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)
Claim 5 clm-7e5f85b4fa4170e1 descriptive
which links datasets held by Transport for London, the ONS, DHSC and four boroughs rather than collecting them
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Press release: the Library works "by connecting, not collecting, datasets held by key London partners starting with Transport for London, the Department of Health and Social Care as well as Barnet, Brent, Camden, and Redbridge councils, and the Office for National Statistics."
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
  2. THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)
Claim 6 clm-3c2b45e5cc47bfd0 quantitative
roughly 5,100 at launch
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Press release: the Library "builds on that legacy, offering more than 5,100 datasets". The GLA's Chief Digital Officer: "5,000+ datasets — more than triple the number available on the existing London Datastore".
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
  2. THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025)
  3. GLA Chief Digital Officer — Introducing the Data for London Library
Claim 7 clm-595dd049caf2b211 quantitative
20,000 by the GLA's count in September 2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The GLA Chief Digital Officer, 25 September 2026: "The Data for London Library now connects 20,000 urban datasets in one searchable place".
Caveat
An operator figure for linked, not hosted, datasets.

Sources carrying this claim

  1. GLA Chief Digital Officer — London's city innovation stack (25 Sep 2026)
Claim 8 clm-6feb9406e84f782f descriptive
the GLA says conditions vary for each data package
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Datastore FAQ: "The license conditions under which data can be used will vary for each data package" and "It is the responsibility of the user to adhere to the individual license conditions".
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. London Datastore — Frequently Asked Questions (licensing)
Claim 9 clm-763396f81510cd73 quantitative
sampled datasets carry Open Government Licence v2 or no licence title at all
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
A sample of five datasets from the Datastore's catalogue API (read 6 August 2026) showed no machine-readable licence identifier on any of them; two named 'Open Government Licence v2' and three gave no licence title.
Caveat
A five-dataset sample, not a census of the catalogue.

Sources carrying this claim

  1. London Datastore CKAN API — package_search
Claim 10 clm-6eaead70b789e8c7 descriptive
The Datastore remains live while further modules of the Data for London programme are built; the Library is the first.
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The live site: the Library is "the first module" of the Data for London programme, and "While further modules are developed, the London Datastore will remain, as ever, a trusted data resource for you to use."
Caveat
The July 2025 press release says the Library 'will replace' the Datastore, without a date.

Sources carrying this claim

  1. Data for London / London Datastore (live platform)
Claim 11 clm-4d39398937c8761a descriptive
Datastore data feeds London's air-pollution alerts, the London Building Stock Model that helps councils prioritise homes for retrofit, and quarterly CHAIN reports on rough sleeping
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
Press release: "Data from the London Datastore has been used to" map and predict air pollution episodes so that pollution alerts can be issued; provide energy-efficiency data for London homes through the London Building Stock Model, which "helps councils to identify and prioritise homes that need retrofitting"; and publish "quarterly and annual CHAIN reports" on rough sleeping.
Caveat
The GLA's own list of uses; it reports no measured effect of any of them.

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
Claim 12 clm-cdac9e74f70d7ce6 quantitative
the Datastore's API listed 1,305 datasets on 5 October 2026
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The CKAN package_search endpoint returned a count of 1305 datasets on 5 October 2026.
Caveat
The Datastore counted more than 6,000 datasets in January 2020; the two counts are not measured the same way and do not show a decline.

Sources carrying this claim

  1. London Datastore CKAN API — package_search
Claim 13 clm-df049d51b98db943 descriptive
A catalogue that federates rather than collects inherits its partners' licence terms
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this file
What the mapping says
The Library connects rather than collects partners' datasets (press release), and the Datastore says licence conditions "will vary for each data package" with users responsible for adhering to them (FAQ).
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Mayor of London — launch of Data for London Library (press release)
  2. London Datastore — Frequently Asked Questions (licensing)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-10-05-baseline effective 2026-10-05 · created 2026-10-05

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:18327fa1fbee2e874bc04638d2395db4b24e0c792d789cfd9420d165cbc31bd3
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
13
of 13 claims mapped
8
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Greater London Authority (Data for London)
Actor types
city-government
Funding model
public
Funding description
GLA; early development supported by Bloomberg Philanthropies
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

8 source dossiers

Mayor of London — launch of Data for London Library (press release) london.gov.uk · 7 linked claims

Open original source ↗

Stable source ID
src-063f9832eb470d53
Publisher
Name not classified · london.gov.uk
Type / language
web-page · language not classified
Published
2025-07-08
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official primary: 8 July 2025 launch, ~5,100 linked datasets, partners. london.gov.uk blocks automated fetch (403) — figures confirmed instead via independent trade press below.

Descriptive only — not page/paragraph exact
Claims linked
Data for London / London Datastore (live platform) data.london.gov.uk · 2 linked claims

Open original source ↗

Stable source ID
src-79116620328e6865
Publisher
Name not classified · data.london.gov.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Fetched 2026-08-06: 'over a thousand datasets'; verbatim on the successor — 'While further modules are developed, the London Datastore will remain, as ever, a trusted data resource for you to use.'

Descriptive only — not page/paragraph exact
Claims linked
London Datastore — Frequently Asked Questions (licensing) data.london.gov.uk · 2 linked claims

Open original source ↗

Stable source ID
src-a61e97a67a6f1d11
Publisher
Name not classified · data.london.gov.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Verbatim: 'The license conditions under which data can be used will vary for each data package' and 'It is the responsibility of the user to adhere to the individual license conditions.' No catalogue-wide licence instrument.

Descriptive only — not page/paragraph exact
Claims linked
London Datastore CKAN API — package_search data.london.gov.uk · 2 linked claims

Open original source ↗

Stable source ID
src-1c6582aedf2779ae
Publisher
Name not classified · data.london.gov.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Primary count: 1,301 datasets on 2026-08-06. Caution: the façade ignores q/rows/facet.field — a control query for a nonexistent licence returned the same 1301, so per-licence counts CANNOT be derived here. Sampled datasets show license_id null throughout; 2 of 5 titled 'Open Government Licence v2', 3 of 5 empty.

Descriptive only — not page/paragraph exact
Claims linked
THINK Digital Partners — Mayor of London launches Data for London Library (8 July 2025) thinkdigitalpartners.com · 4 linked claims

Open original source ↗

Stable source ID
src-6498cf3580f14fab
Publisher
Name not classified · thinkdigitalpartners.com
Type / language
web-page · language not classified
Published
2025-07-08
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Independent press: launch date, 5,100+ datasets, 'connect, not collect' wording, partner list, 'It replaces the London Datastore, which was first launched in 2010.'

Descriptive only — not page/paragraph exact
Claims linked
GLA Chief Digital Officer — Introducing the Data for London Library chiefdigitalofficer4london.medium.com · 1 linked claim

Open original source ↗

Stable source ID
src-04db0f01aaa68860
Publisher
Name not classified · chiefdigitalofficer4london.medium.com
Type / language
web-page · language not classified
Published
2025-07-15
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official GLA blog (published 15 July 2025, after the 8 July launch): '5,000+ datasets — more than triple the number available on the existing London Datastore'; beta status; Bloomberg Philanthropies supported the early development phase.

Descriptive only — not page/paragraph exact
Claims linked
GLA Chief Digital Officer — London's city innovation stack (25 Sep 2026) chiefdigitalofficer4london.medium.com · 1 linked claim

Open original source ↗

Stable source ID
src-496bfa38ce285073
Publisher
Name not classified · chiefdigitalofficer4london.medium.com
Type / language
web-page · language not classified
Published
2026-09-25
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

GLA Chief Digital Officer: the Data for London Library now connects 20,000 urban datasets.

Descriptive only — not page/paragraph exact
Claims linked
Mayor of London — London Datastore marks 10 years (press release, 8 Jan 2020) london.gov.uk · background

Open original source ↗

Stable source ID
src-0dd72670f771b6b3
Publisher
Name not classified · london.gov.uk
Type / language
web-page · language not classified
Published
2020-01-08
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-10-05
Dossier created
2026-10-05
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Ten-year mark: around 60,000 users a month and more than 6,000 datasets, up from around 500 at the 2010 launch; ODI report on the Datastore's future.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Known limits of this file
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇫🇮 Helsinki Region Infoshare (HRI) Open Data Portal · Helsinki Early European open-data portals: London's Datastore (2010) came a year before Helsinki pooled four cities' data into HRI (2011). 🇪🇸 Open Data BCN · Barcelona London's Datastore (2010) opened just before the 2011 European open-data wave; Barcelona put Open Data BCN on CKAN that year. 🇬🇧 Emerging Technology Charter & London Privacy Register · London The London Privacy Register is published as an open dataset on the Datastore — surveillance transparency catalogued as open data.

Explore the wider context

🗺️ Your City's Problem Map Is Really a Map of Who Complains📖 Open data📖 Urban data platform (UDP)📖 Building performance standard (BPS)
📎 Cite this project

1001 Smart Cities (2026). “London Datastore & Data for London Library” — London, United Kingdom. The Smart City Atlas. https://1001smartcities.org/projects/london-datastore-data-library/ (last verified 2026-10-05). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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