Private Limited Company

ELSEVIER LIMITED

ActiveCompany 01982084United Kingdom
Bulk record snapshot1 AUG 2026Source details →

Registered office

125 LONDON WALL, LONDON, UNITED KINGDOM, EC2Y 5AS
Incorporated24 January 1986
Company age40 years

TXT In plain English

Company description

BritDB description

ELSEVIER LIMITED is a UK company whose Companies House status is “Active” and whose registered company type is “Private Limited Company”. Incorporated on 24 January 1986; registered for 40 years; registered office reported in LONDON, UNITED KINGDOM. Its primary declared activity is 62090 · Other information technology service activities.

This BritDB profile also contains linked public records: 2 PSC records, 15 trade marks, 10 procurement records. This description is assembled from public data, is not a reliability assessment, and should be checked against the cited sources before a legally significant decision.

Prepared from public dataChecked 1 September 2026 · 12 profile sources connected
How this description is built →
i

Web facts are never added from a name match alone. Internet enrichment requires the exact Companies House ID in Wikidata, and ambiguous results are excluded.

01 Company overview

Identity and registration

Snapshot 1 August 2026
Official name
ELSEVIER LIMITED
Company number
01982084
Company type
Private Limited Company
Status
Active
Country of origin
United Kingdom
Dissolution date
Not supplied
Accounts category
FULL
Mortgage charges
1 total · 0 outstanding · 1 satisfied
Limited partnership members
0 general · 0 limited
i

A registered office is not necessarily a trading location. The address is reproduced from the Companies House bulk record and should be interpreted in that legal context.

02 Filing dates

Accounts and statements

Companies House
AccountsBulk record

Last accounts made up to

31 December 2025

Next accounts due

30 September 2027
Confirmation statementBulk record

Last statement made up to

22 June 2026

Next statement due

6 July 2027
Filing source and official link

BritDB does not infer overdue status when the source does not state it.

03 Workforce reporting

Gender pay gap

Reporting year 2025–2026
Employer size1000 to 4999
Median hourly gap32.1%
Mean hourly gap24.8%
Submitted17 March 2026
Submission deadline5 April 2026
Submission timingSubmitted by deadline
Median bonus gap
27.1%
Mean bonus gap
-4.3%
Women receiving bonus
61.8%
Men receiving bonus
85.8%
Women in top quartile
25.6%
Women in upper middle quartile
37.6%
Women in lower middle quartile
56.9%
Women in lower quartile
72.1%
Earlier reporting years (8)
  1. 1000 to 499932.8% median hourly gap
  2. 1000 to 499933.6% median hourly gap
  3. 1000 to 499934.1% median hourly gap
  4. 1000 to 499936.0% median hourly gap
  5. 1000 to 499936.2% median hourly gap
  6. 1000 to 499937.0% median hourly gap
  7. 1000 to 499939.4% median hourly gap
  8. 1000 to 499940.4% median hourly gap
i

Positive gaps mean men were paid more; negative gaps mean women were paid more. These figures are employer-reported and describe the workforce distribution, not equal pay for the same job. The company link uses the exact Companies House number supplied by the service.

04 Supplier payments

Payment practices and performance

Period to 30 June 2026
Average time to pay15.0 days
Paid within 30 days85.0%
Paid after 60 days1.0%
Not paid within terms4.0%
Reporting period
1 January 2026 – 30 June 2026
Filed
3 August 2026
Shortest standard term
45 days
Longest standard term
Not supplied
E-invoicing offered
Yes
Supply-chain finance
Not offered
Payment codes
UK Prompt Payment Code
Construction retentions
No retention clauses reported
Complete reported payment fields
Policy regime
Regime-3
Financial period started
1 January 2026
Qualifying contracts
Yes
Payments made
Yes
Invoice value paid within 30 days
£85,244,460
Invoice value paid in 31–60 days
£16,567,425
Invoice value paid after 60 days
£3,607,860
Invoice value paid outside agreed terms
£10,445,380
Invoices paid in 31–60 days
14.0%
Invoices unpaid due to dispute
0.0%
Maximum contractual payment period
60 days
Supplier-list charging policy
No
Supplier-list charges made
No
Retention in all contracts
No
Retention in standard terms
No
Retention threshold
Not supplied
Standard retention rate
Not supplied
Retention compared with client
Not supplied
Retention compared with payments
Not supplied
Reported terms and dispute process
  1. Standard payment terms

    Elsevier Ltd's standard payment term for suppliers is 45 days from receipt of a valid invoice. Certain supplier categories are subject to specific payment arrangements, including royalty, rent, and lease-related payments, while some suppliers may be paid earlier where early settlement discounts are agreed. In line with prompt payment requirements, suppliers classified as small businesses are generally paid within 30 days. During the reporting period, the maximum contractual payment term was 60 days. There were no changes to the company's standard payment terms during the reporting period.

  2. Dispute resolution process

    Elsevier Ltd’s supplier relationships are governed by its Standard Terms of Purchase, which set out the contractual framework for purchasing goods and services. The company operates a dedicated Payments Helpdesk for supplier invoice and payment enquiries, which can be contacted in the UK on +44 1865 84 3198. The Helpdesk is responsible for investigating and resolving invoice and payment-related queries and aims to respond within 48 hours. Where a supplier is dissatisfied with the outcome of a query, the matter may be escalated to the Head of Procure to Pay or the relevant business representative responsible for managing the supplier relationship. Disputes relating to contractual terms or supplier performance are referred to the appropriate business contact for direct resolution with the supplier.

Earlier payment reports (11 shown)
  1. 19.0 average days to pay15.0% outside terms
  2. 21.0 average days to pay5.0% outside terms
  3. 24.0 average days to pay3.0% outside terms
  4. 24.0 average days to pay5.0% outside terms
  5. 26.0 average days to pay11.0% outside terms
  6. 22.0 average days to pay3.0% outside terms
  7. Average time not suppliedLate-payment rate not supplied
  8. 27.0 average days to pay7.0% outside terms
  9. 28.0 average days to pay3.0% outside terms
  10. 19.0 average days to pay5.0% outside terms
  11. 24.0 average days to pay10.0% outside terms
i

This is a company-submitted statutory disclosure, not a credit rating. BritDB preserves the reporting period and links the report only through the Companies House number supplied by the official service. Percentages describe payments made during that period and may change in later reports.

05 Global legal identity

Legal Entity Identifier

Snapshot 31 August 2026
ISSUED · ACTIVE

ELSEVIER LIMITED

LEI 5493004K0NPPLK135K42 · jurisdiction GB

Legal form
H0PO
Entity category
GENERAL
Entity created
24 January 1986
Initial LEI registration
5 February 2014
LEI last updated
11 May 2026
Next renewal
26 June 2027
Managing LOU
213800WAVVOPS85N2205
Legal address
125 LONDON WALL, LONDON, GB-LND, EC2Y 5AS, GB
Headquarters address
125 LONDON WALL, LONDON, GB-LND, EC2Y 5AS, GB

GLEIF Level 2 relationships

ACTIVE · PUBLISHED

IS DIRECTLY CONSOLIDATED BY

From LEI 5493004K0NPPLK135K42 to LEI 549300XQ042S6J1O7T93

Related legal entity
RELX (UK) LIMITED →
Initial registration
5 February 2014
Last updated
11 May 2026
Next renewal
26 June 2027
Validation sources
FULLY_CORROBORATED
Validation documents
ACCOUNTS_FILING
Relationship periods
Start: 2022-01-01T00:00:00Z; End: 2022-12-31T00:00:00Z; Type: ACCOUNTING_PERIOD; Start: 2023-06-26T00:00:00Z; Type: RELATIONSHIP_PERIOD; Start: 2021-01-01T00:00:00Z; End: 2021-12-31T00:00:00Z; Type: DOCUMENT_FILING_PERIOD
Qualifiers
Dimension: ACCOUNTING_STANDARD; Category: IFRS
Validation reference
https://find-and-update.company-information.service.gov.uk/company/01982084/filing-history/MzM4MTk4NzUxOWFkaXF6a2N4/document?format=pdf&download=0
ACTIVE · PUBLISHED

IS ULTIMATELY CONSOLIDATED BY

From LEI 5493004K0NPPLK135K42 to LEI 549300WSX3VBUFFJOO66

Related legal entity
RELX PLC →
Initial registration
5 February 2014
Last updated
11 May 2026
Next renewal
26 June 2027
Validation sources
FULLY_CORROBORATED
Validation documents
ACCOUNTS_FILING
Relationship periods
Start: 2022-01-01T00:00:00Z; End: 2022-12-31T00:00:00Z; Type: ACCOUNTING_PERIOD; Start: 2023-06-26T00:00:00Z; Type: RELATIONSHIP_PERIOD; Start: 2021-01-01T00:00:00Z; End: 2021-12-31T00:00:00Z; Type: DOCUMENT_FILING_PERIOD
Qualifiers
Dimension: ACCOUNTING_STANDARD; Category: IFRS
Validation reference
https://find-and-update.company-information.service.gov.uk/company/01982084/filing-history/MzM4MTk4NzUxOWFkaXF6a2N4/document?format=pdf&download=0
i

LEI data provides global legal identity and source-reported relationships, not a credit or regulatory approval. BritDB links Level 1 identities only through GLEIF’s Companies House registration-authority identifier and exact company number; Level 2 parent and fund relationships and reporting exceptions are reproduced as supplied by GLEIF.

06 Supply-chain transparency

Modern slavery statement

Statement year 2026
Organisation
ELSEVIER LIMITED
Group submission
Yes
Parent organisation
RELX PLC
Statement period
1 January 2025 – 31 December 2025
Approved
10 February 2026
Sectors
Information technology and telecommunication Media, publishing, arts and entertainment Professional and administrative services and supplies, including legal, consulting and accounting services

Organisation structure

Covered in the statement

Policies

Covered in the statement

Risk assessment

Covered in the statement

Due diligence

Covered in the statement

Training

Covered in the statement

Goals and KPIs

Covered in the statement

Full statement information supplied to the registry
Reported turnover band
Over £500 million
Years producing statements
More than 5 years
ILO indicators included
Not answered
Registry record updated
4 March 2026

Policies described

Freedom of workers to terminate employment Freedom of movement Freedom of association Prohibits any threat of violence, harassment and intimidation Prohibits the use of worker-paid recruitment fees Prohibits compulsory overtime Prohibits child labour Prohibits discrimination Provides access to remedy, compensation and justice for victims of modern slavery

Training described

Your front line staff Procurement staff Your suppliers

Worker engagement and working conditions

Your suppliers Professional auditors Workers within your organisation Workers within your supply chain Businesses in your industry or sector

Social audits

Third party audit arranged by your organisation Announced audit Unannounced audit

Grievance mechanisms

Using anonymous whistleblowing services, such as a helpline or mobile phone app

Other monitoring

We review living wages, and use benchmarking. We have the SRS programme & Supplier Code of Conduct to set clear expectations

Demonstrated progress

Our statement shows progress by annually reporting the steps taken to prevent modern slavery, building on past statements and continuously strengthening supplier oversight and actions across our global operations and supply chain. We set annual objectives and KPIs and report on achievements across the year.

i

A registry entry records what the organisation declared in its statement. It is not an independent audit. Group statements can cover several companies; BritDB preserves each exact source-supplied company-number link and excludes approver names and email addresses.

07 Public procurement

Contracts Finder awards

Exact GB-COH links
active · 15 September 2025

Renewal of Researchfish

UNIVERSITY OF SOUTHAMPTON · ocds-b5fd17-83b3814c-6856-4e85-b3c0-f7cebcb58be4

Supplier named in award
Elsevier Limited
Award value
£212,432.20
Contract period
1 October 2025 – 30 September 2026
Published
16 September 2025
Procedure
Call-off from a framework agreement
Main CPV
48000000
Source release ID
ocds-b5fd17-83b3814c-6856-4e85-b3c0-f7cebcb58be4-2025-09-16T11:45:37+01:00
active · 20 June 2024

Licence for SCOPUS electronic resource 24-29

THE UNIVERSITY OF BIRMINGHAM · ocds-b5fd17-1cc04faa-001d-4366-b7fb-f439a2af5889

Supplier named in award
ELSEVIER LIMITED
Award value
£213,703.93
Contract period
19 June 2024 – 31 March 2029
Published
30 October 2024
Procedure
Call-off from a framework agreement
Main CPV
48100000
Source release ID
ocds-b5fd17-1cc04faa-001d-4366-b7fb-f439a2af5889-2024-10-30T11:52:47Z
active · 17 May 2024

Research Data Software

UNIVERSITY OF EAST ANGLIA · ocds-b5fd17-dfc75802-8385-4596-a151-07acdbe50e34

Supplier named in award
Elsevier
Award value
£0
Contract period
20 May 2024 – 20 May 2025
Published
31 May 2024
Procedure
Single tender action (below threshold)
Main CPV
48611000
Source release ID
ocds-b5fd17-dfc75802-8385-4596-a151-07acdbe50e34-2024-05-31T14:58:36+01:00
active · 1 May 2024

Research outcomes

UK SHARED BUSINESS SERVICES LIMITED · ocds-b5fd17-f650f2c9-b360-48c7-885e-fada059a8576

Supplier named in award
Elsevier
Award value
£483,045
Contract period
1 May 2024 – 30 April 2025
Published
27 June 2024
Procedure
Call-off from a framework agreement
Main CPV
72000000
Source release ID
ocds-b5fd17-f650f2c9-b360-48c7-885e-fada059a8576-2024-06-27T14:38:38+01:00
active · 27 September 2023

Researchfish Licence Renewal

UNIVERSITY OF SOUTHAMPTON · ocds-b5fd17-bd6c3ddd-d985-451f-b596-fb25f75c6b19

Supplier named in award
ELSEVIER LIMITED
Award value
£324,887.64
Contract period
1 October 2023 – 30 September 2025
Published
28 September 2023
Procedure
Call-off from a framework agreement
Main CPV
48000000
Source release ID
ocds-b5fd17-bd6c3ddd-d985-451f-b596-fb25f75c6b19-2023-09-28T09:52:22+01:00
active · 27 June 2023

Research Information Management System

UNIVERSITY OF EAST ANGLIA · ocds-b5fd17-a526cbab-4a5b-451b-8cfc-2b23df2a9e02

Supplier named in award
ELSEVIER LIMITED
Award value
£0
Contract period
1 August 2023 – 31 July 2028
Published
28 July 2023
Procedure
Single tender action (below threshold)
Main CPV
48612000
Source release ID
ocds-b5fd17-a526cbab-4a5b-451b-8cfc-2b23df2a9e02-2023-07-28T10:51:44+01:00
active · 18 September 2022

Subscription to Science Direct additional ebook content

UNIVERSITY OF EAST ANGLIA · ocds-b5fd17-e5702405-7abf-41f7-8e48-951e8fee386f

Supplier named in award
ELSEVIER LIMITED
Award value
£0
Contract period
19 September 2022 – 30 September 2024
Published
13 December 2022
Procedure
Single tender action (below threshold)
Main CPV
22000000
Source release ID
ocds-b5fd17-e5702405-7abf-41f7-8e48-951e8fee386f-2022-12-13T16:10:07Z
active · 1 February 2022

PS22054 - UKRI China Impact Report

UK SHARED BUSINESS SERVICES LIMITED · ocds-b5fd17-a19adce7-acad-4814-b560-1a649809d093

Supplier named in award
ELSEVIER LIMITED
Award value
£24,500
Contract period
4 February 2022 – 1 July 2022
Published
8 April 2022
Procedure
Open procedure (below threshold)
Main CPV
73200000
Source release ID
ocds-b5fd17-a19adce7-acad-4814-b560-1a649809d093-2022-04-08T09:04:52+01:00
active · 26 November 2021

ClinicalKey Collections Subscription

ST HELENS & KNOWSLEY TEACHING HOSPITALS NHS TRUST · ocds-b5fd17-9b53f4fb-b21d-48f0-bf7f-c6e189c01175

Supplier named in award
Elsevier Ltd
Award value
£34,750
Contract period
31 October 2021 – 30 October 2022
Published
9 May 2022
Procedure
Call-off from a framework agreement
Main CPV
92511000
Source release ID
ocds-b5fd17-9b53f4fb-b21d-48f0-bf7f-c6e189c01175-2022-05-09T16:59:47+01:00
i

The supplier link is exact, but the award remains buyer-published procurement data. BritDB requires the GB-COH identifier supplied in the Contracts Finder OCDS release and does not infer suppliers from similar names.

TM UK trade marks

Exact owner-name matches

15 records
Registered · UK00002168731

NEWNES

Owner Elsevier Limited · classes 9

Filed / designated
6 June 1998
Valid until / renewal due
6 June 2018
Open BritTM →
Registered · UK00002022629

CURRENT BIOLOGY

Owner Elsevier Limited · classes 9,16

Filed / designated
1 June 1995
Valid until / renewal due
1 June 2025
Open BritTM →
Registered · UK00001472785

NEWNES

Owner Elsevier Limited · classes 16

Filed / designated
8 August 1991
Valid until / renewal due
8 August 2018
Open BritTM →
Registered · UK00001304613

GEOBASE

Owner Elsevier Limited · classes 9

Filed / designated
20 March 1987
Valid until / renewal due
20 March 2018
Open BritTM →
Dead · UK00002242999

PDxMD

Owner Elsevier Limited · classes 9,16,41,42

Filed / designated
18 August 2000
Valid until / renewal due
18 August 2010
Open BritTM →
Dead · UK00002200561

TONY COPPERFIELD

Owner Elsevier Limited · classes 16,41,42

Filed / designated
18 June 1999
Valid until / renewal due
18 June 2009
Open BritTM →
Removed · UK00002136767

DOCTOR BUYLINES

Owner Elsevier Limited · classes 10,16

Filed / designated
24 June 1997
Valid until / renewal due
24 June 2017
Open BritTM →
Dead · UK00002070962

PRACTICE NURSE

Owner Elsevier Limited · classes 16

Filed / designated
10 May 1996
Valid until / renewal due
10 May 2016
Open BritTM →
Dead · UK00001343982

PERGAMON COMPACT SOLUTION

Owner Elsevier Limited · classes 9

Filed / designated
10 May 1988
Valid until / renewal due
10 May 2005
Open BritTM →
Dead · UK00001343983

PERGAMON COMPACT SOLUTION

Owner Elsevier Limited · classes 42

Filed / designated
10 May 1988
Valid until / renewal due
10 May 2005
Open BritTM →
Expired · UK00001290198

LAXTONS

Owner Elsevier Limited · classes 16

Filed / designated
6 November 1986
Valid until / renewal due
6 November 2017
Open BritTM →
Dead · UK00001278932

COMPSEC

Owner Elsevier Limited · classes 42

Filed / designated
1 October 1986
Valid until / renewal due
1 October 2007
Open BritTM →
Dead · UK00001245028

COMPSEC

Owner Elsevier Limited · classes 16

Filed / designated
28 June 1985
Valid until / renewal due
28 June 2016
Open BritTM →
Dead · UK00001187017

Made Simple Books

Owner Elsevier Limited · classes 16

Filed / designated
13 December 1982
Valid until / renewal due
13 December 2013
Open BritTM →
Dead · UK00001172949

Figurative mark

Owner Elsevier Limited · classes 16

Filed / designated
6 April 1982
Valid until / renewal due
6 April 2013
Open BritTM →
!

This is an exact normalised company-name match, not a registrar-confirmed ownership link. Another legal entity can have the same or a very similar name. UKIPO data is a historical 2018 snapshot; verify the owner and current status before relying on it.

08 Ownership and control

People with significant control

Snapshot 25 August 2026
Current records1
Ceased records1
PSC source and official link →
Corporate entityCurrent

Relx (Uk) Limited

  • Owns 75% or more of shares
  • Controls 75% or more of voting rights
  • Can appoint or remove directors
Country registered
United Kingdom
Legal authority
United Kingdom (England And Wales)
Legal form
Corporate
Place registered
Companies House
Registration number
02746621
Notified
6 April 2016
Corporate entityCeased

Relx (Uk) Limited

  • Owns 75% or more of shares
  • Controls 75% or more of voting rights
  • Can appoint or remove directors
Country registered
England
Legal authority
United Kingdom (England)
Legal form
Limited By Shares
Place registered
Companies House
Registration number
2746621
Notified
6 April 2016
Ceased
28 April 2020
i

PSC records are company-filed public-register information. When the exact same displayed individual name occurs at multiple companies, BritDB offers a non-indexed cross-reference page. It is a name match only, not proof that the records describe the same person. Service addresses and partial dates of birth are deliberately omitted.

09 Charity register

Charity Commission links

Snapshot 25 August 2026
CCEW

No exact company-number link in this snapshot

The Charity Commission extract did not explicitly associate this Companies House number with a charity. BritDB does not use a name-only match to fill the gap.

i

This company-level check covers the Charity Commission for England and Wales. Links are accepted only when the official extract supplies this exact company registration number. Scottish charities now have separate OSCR profiles, but OSCR’s bulk fields do not provide a Companies House number, so BritDB does not infer a company link.

10 Northern Ireland charity register

CCNI exact company links

Snapshot 25 August 2026
CCNI

No unambiguous company-number link found

The CCNI source number did not resolve uniquely to this Companies House record. BritDB did not use a name or address match.

i

CCNI publishes company numbers without a jurisdiction prefix. BritDB links only when the plausible padded UK and NI candidates resolve to exactly one Companies House company.

11 Sanctions screening

UK Sanctions List

Report 28 August 2026
UKSL

No exact business-registration-number link found

The imported UK Sanctions List did not supply this Companies House number as a UK-linked business identifier. BritDB did not attempt a name-only match.

!

No exact link is not sanctions clearance. UK restrictions can apply through ownership or control even where an entity is not separately named. Always use the current official list and obtain appropriate advice for a legally significant decision.

12 Public procurement

Find a Tender links

Snapshot 22 August 2026
i

These links use only the GB-COH identifier supplied in the procurement record. A company may have other public-sector work that is absent, older, below publication thresholds or published without a Companies House identifier.

13 Environmental register

Environment Agency waste registrations

Snapshot 25 August 2026
EA

No exact company-number registration linked

The licensed Environment Agency subset did not contain this exact Companies House number. BritDB did not attempt a name-only match.

i

This is a privacy-reduced, exact-company subset. The full official register also includes sole traders and applicants without a matching Companies House number. Check the current Environment Agency register before relying on registration status.

14 Nature of business

Standard Industrial Classification

SIC 2007

15 Connected public record

Checks beyond the company register

Partial coverage
CCEW

Charity Commission

0 exact company-number links.

Checked
CCNI

Northern Ireland charities

0 unambiguous company-number links.

Checked
FTS

Public contracts

1 procurement process linked by exact GB-COH identifier.

Checked
EA

Waste register

0 exact company-number registrations.

Checked
GZ

Corporate notices

The Gazette is not yet connected.

Not checked
UKSL

UK Sanctions List

No exact business-registration-number link in this report.

Checked
!

A checked source with no exact link is not a clean bill of health. Unchecked sources remain unknown, while sanctions may also apply through ownership or control of a listed person or entity.

16 Record timeline

Dates in the bulk record

3 events
  1. Confirmation statement

    Latest confirmation statement made up to this date

  2. Accounts

    Latest accounts made up to this date

  3. Incorporation

    Company incorporated

17 Provenance

Sources for this profile

12 sources
CH
Companies House Free Company Data Product

Identity, address, status, dates, SIC, previous names and mortgage totals.

Snapshot 1 August 2026
GPG
UK Gender Pay Gap Service

Annual employer reports linked by the exact source-supplied Companies House number.

9 reporting years
PPR
UK Payment Practices Reporting

Statutory supplier-payment reports linked by the exact source-supplied Companies House number.

12 reports shown
LEI
GLEIF LEI Golden Copy

Global legal identities linked through Companies House registration authority RA000585.

1 exact LEI
MSS
Modern Slavery Statement Registry

Annual statement summaries linked by exact source company number.

1 linked statement
CF
Contracts Finder OCDS

Historic awards linked by exact source-supplied GB-COH company identifier.

9 exact awards
PSC
Companies House PSC snapshot

Current and ceased significant-control records joined by exact company number.

Snapshot 25 August 2026
CCEW
Charity Commission Register of Charities

Daily England and Wales extract matched only by the official company registration number.

Snapshot 25 August 2026
CCNI
Northern Ireland Register of Charities

Daily CCNI export with company links only where the source number resolves unambiguously.

0 exact links
UKSL
UK Sanctions List

Complete FCDO list checked by exact UK-linked business registration number.

Checked 28 August 2026
FTS
Find a Tender OCDS data

Procurement parties checked only through exact GB-COH identifiers.

1 exact process
EA
Environment Agency waste register

Licensed subset linked only by exact Companies House number.

0 exact registrations
+
Other registers

Financial regulation and licences.

Not checked yet

Companies House, Charity Commission, OSCR and UK Sanctions List information is public-register data. BritDB reproduces and organises it with source-specific limits; official external links are kept on the dedicated source pages.