Private Limited Company

UCB PHARMA LIMITED

ActiveCompany 00209905United Kingdom
Bulk record snapshot1 AUG 2026Source details →

Registered office

208 BATH ROAD, SLOUGH, BERKSHIRE, SL1 3WE
Incorporated24 November 1925
Company age100 years

TXT In plain English

Company description

BritDB description

UCB PHARMA LIMITED is a UK company whose Companies House status is “Active” and whose registered company type is “Private Limited Company”. Incorporated on 24 November 1925; registered for 100 years; registered office reported in BERKSHIRE. Its primary declared activity is 21100 · Manufacture of basic pharmaceutical products.

This BritDB profile also contains linked public records: 1 PSC record, 21 trade marks, 13 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 31 August 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
UCB PHARMA LIMITED
Company number
00209905
Company type
Private Limited Company
Status
Active
Country of origin
United Kingdom
Dissolution date
Not supplied
Accounts category
FULL
Mortgage charges
7 total · 0 outstanding · 7 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

12 May 2026

Next statement due

26 May 2027
Filing source and official link

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

03 Supplier payments

Payment practices and performance

Period to 30 June 2026
Average time to pay49.0 days
Paid within 30 days17.0%
Paid after 60 days34.0%
Not paid within terms6.0%
Reporting period
1 January 2026 – 30 June 2026
Filed
21 July 2026
Shortest standard term
15 days
Longest standard term
90 days
E-invoicing offered
Yes
Supply-chain finance
Not offered
Payment codes
No
Construction retentions
No qualifying construction contracts
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
£160,759
Invoice value paid in 31–60 days
£3,319,722
Invoice value paid after 60 days
£373,672
Invoice value paid outside agreed terms
£3,854,153
Invoices paid in 31–60 days
49.0%
Invoices unpaid due to dispute
0.0%
Maximum contractual payment period
90 days
Supplier-list charging policy
No
Supplier-list charges made
No
Reported terms and dispute process
  1. Standard payment terms

    UCB payment terms are 60 days for most vendors. Some vendors are paid on 30 days term.

  2. Dispute resolution process

    Any complaints regarding payment are to be logged with our account payables helpdesk. It will be then raised with the payment team and cause, and resolution will be investigated. If there is any escalation it will be referred to the local account payables lead.

Earlier payment reports (11 shown)
  1. 50.0 average days to pay8.0% outside terms
  2. 50.0 average days to pay0.0% outside terms
  3. 48.0 average days to pay8.0% outside terms
  4. 43.0 average days to pay4.0% outside terms
  5. 49.0 average days to pay7.0% outside terms
  6. 53.0 average days to pay16.0% outside terms
  7. 51.0 average days to pay12.0% outside terms
  8. 51.0 average days to pay12.0% outside terms
  9. 49.0 average days to pay7.0% outside terms
  10. 49.0 average days to pay11.0% outside terms
  11. 51.0 average days to pay9.0% 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.

04 Global legal identity

Legal Entity Identifier

Snapshot 31 August 2026
ISSUED · ACTIVE

UCB PHARMA LIMITED

LEI 21380083DWCEAVWH1W57 · jurisdiction GB

Legal form
H0PO
Entity category
GENERAL
Entity created
24 November 1995
Initial LEI registration
5 February 2014
LEI last updated
13 January 2026
Next renewal
11 March 2027
Managing LOU
213800WAVVOPS85N2205
Legal address
208 BATH ROAD, SLOUGH, GB-SLG, SL1 3WE, GB
Headquarters address
208 BATH ROAD, SLOUGH, GB-SLG, SL1 3WE, GB

GLEIF Level 2 relationships

ACTIVE · PUBLISHED

IS DIRECTLY CONSOLIDATED BY

From LEI 21380083DWCEAVWH1W57 to LEI 2138008J191VLSGY5A09

Initial registration
5 February 2014
Last updated
13 January 2026
Next renewal
11 March 2027
Validation sources
ENTITY_SUPPLIED_ONLY
Validation documents
OTHER_OFFICIAL_DOCUMENTS
Relationship periods
Start: 2019-01-01T00:00:00Z; End: 2019-12-31T00:00:00Z; Type: ACCOUNTING_PERIOD; Start: 2014-02-05T00:00:00Z; Type: RELATIONSHIP_PERIOD
Qualifiers
Dimension: ACCOUNTING_STANDARD; Category: OTHER_ACCOUNTING_STANDARD
Validation reference
Not supplied
ACTIVE · PUBLISHED

IS ULTIMATELY CONSOLIDATED BY

From LEI 21380083DWCEAVWH1W57 to LEI 2138008J191VLSGY5A09

Initial registration
5 February 2014
Last updated
13 January 2026
Next renewal
11 March 2027
Validation sources
FULLY_CORROBORATED
Validation documents
ACCOUNTS_FILING
Relationship periods
Start: 2019-01-01T00:00:00Z; End: 2019-12-31T00:00:00Z; Type: ACCOUNTING_PERIOD; Start: 2014-02-05T00:00:00Z; Type: RELATIONSHIP_PERIOD
Qualifiers
Dimension: ACCOUNTING_STANDARD; Category: IFRS
Validation reference
https://reports.ucb.com/2019/integrated-annual-report/servicepages/downloads/files/entire_en_ucb_ir19.pdf
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.

05 Supply-chain transparency

Modern slavery statement

Statement year 2025
Organisation
UCB PHARMA LIMITED
Group submission
Yes
Statement period
1 July 2024 – 30 June 2025
Approved
1 July 2025
Sectors
Healthcare and pharmaceuticals

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
22 September 2025
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.

06 Data protection

ICO fee-payer registration

Candidate match
Tier 2

UCB Pharma Limited

Registration Z5734966

Registered from
11 September 2001
Current end date
10 September 2026
!

This is a candidate association, not an official Companies House link. The ICO file supplies no company number. The organisation name and postcode uniquely matched this company in the current snapshot. BritDB excludes all DPO contact fields and does not publish unmatched personal entries.

07 Public procurement

Contracts Finder awards

Exact GB-COH links
active · 11 February 2021

NHS Framework, North of England, Branded Medicines-Tranche A and Annual Tranche

NHS England · ocds-b5fd17-711f74f7-430c-4b80-a5e0-b3ce69f928b9

Supplier named in award
UCB Pharma Ltd
Award value
£1
Contract period
1 March 2021 – 28 February 2023
Published
13 May 2021
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-711f74f7-430c-4b80-a5e0-b3ce69f928b9-2021-05-13T10:21:38+01:00
active · 25 January 2021

NHS Framework for the Midlands and East, Branded Medicines - Tranche B

NHS England · ocds-b5fd17-a3813112-7a5b-461b-9e42-ccdb117c93ef

Supplier named in award
UCB Pharma Ltd
Award value
£228,156,862
Contract period
1 March 2021 – 28 February 2023
Published
30 April 2021
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-a3813112-7a5b-461b-9e42-ccdb117c93ef-2021-04-30T13:00:26+01:00
active · 17 June 2020

NHS Framework for the NHS London Region, Branded Medicines - Tranche A

NHS England · ocds-b5fd17-20ae12c6-3ba8-40bb-b423-51a2c2de6a67

Supplier named in award
UCB Pharma Ltd
Award value
£191,062,951
Contract period
1 September 2020 – 31 August 2022
Published
15 September 2020
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-20ae12c6-3ba8-40bb-b423-51a2c2de6a67-2020-09-15T14:26:04+01:00
active · 13 February 2020

NHS Framework Agreement - North of England - Tranche B

NHS England · ocds-b5fd17-2774d91d-05e7-400d-a217-4a5ca9db01ef

Supplier named in award
UCB PHARMA LIMITED
Award value
£205,535,556
Contract period
1 March 2020 – 28 February 2022
Published
25 March 2020
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-2774d91d-05e7-400d-a217-4a5ca9db01ef-2020-03-25T08:39:13Z
active · 15 January 2020

NHS Midlands and East Branded Medicines - Tranche A

NHS England · ocds-b5fd17-1d021051-40c8-4883-ba04-47625826b7b8

Supplier named in award
UCB PHARMA LTD
Award value
£418,787,000
Contract period
1 March 2020 – 28 February 2022
Published
13 February 2020
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-1d021051-40c8-4883-ba04-47625826b7b8-2020-02-13T09:40:57Z
active · 1 August 2019

NHS South of England Branded Medicines - Tranche A - Contracts Finder Award Notice

NHS England · ocds-b5fd17-8b5e045d-6a03-4c26-b452-fcd5b23d5349

Supplier named in award
UCB PHARMA LIMITED
Award value
£188,004,961
Contract period
1 September 2019 – 31 August 2021
Published
17 October 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-8b5e045d-6a03-4c26-b452-fcd5b23d5349-2019-10-17T10:16:17+01:00
active · 5 July 2019

NHS Framework Agreement for Branded medicines - London - Tranche B - Contracts Finder Opportunity

NHS England · ocds-b5fd17-aaa2bd9e-0fdb-4884-8fca-b0d29a6ed15a

Supplier named in award
UCB Pharma Ltd
Award value
£251,930,337
Contract period
1 September 2019 – 31 August 2020
Published
1 October 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-aaa2bd9e-0fdb-4884-8fca-b0d29a6ed15a-2019-10-01T15:57:02+01:00
active · 1 May 2019

NHS Framework Agreement for Branded Medicines - National

NHS England · ocds-b5fd17-67d93048-4af9-4a0e-b313-bc852f01fca7

Supplier named in award
UCB Pharm Ltd
Award value
£1,351,341,890
Contract period
1 May 2019 – 30 April 2021
Published
9 August 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-67d93048-4af9-4a0e-b313-bc852f01fca7-2019-08-09T15:57:38+01:00
active · 17 January 2019

NHS England - Midlands and East Branded Medicines - Tranche B

NHS England · ocds-b5fd17-6c7a4e2c-58d3-4c41-8f77-dc419f83871c

Supplier named in award
UCB Pharma Ltd 208 Bath Road, Slough, Berkshire, SL1 3WE
Award value
£295,035,882
Contract period
1 March 2019 – 28 March 2021
Published
9 April 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-6c7a4e2c-58d3-4c41-8f77-dc419f83871c-2019-04-09T11:25:43+01:00
active · 17 January 2019

NHS England - Midlands and East Branded Medicines - Tranche B

NHS England · ocds-b5fd17-9878d09a-d11a-4940-a851-2b2b759217f2

Supplier named in award
UCB Pharma Ltd 208 Bath Road, Slough, Berkshire, SL1 3WE
Award value
£295,035,882
Contract period
1 March 2019 – 28 March 2021
Published
9 April 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-9878d09a-d11a-4940-a851-2b2b759217f2-2019-04-09T11:04:50+01:00
active · 17 January 2019

NHS England - Midlands and East Branded Medicines - Tranche B

NHS England · ocds-b5fd17-679e36df-b147-44d9-b0c1-53e4b91250c8

Supplier named in award
UCB Pharma Ltd 208 Bath Road, Slough, Berkshire, SL1 3WE
Award value
£295,035,882
Contract period
1 March 2019 – 28 March 2021
Published
9 April 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-679e36df-b147-44d9-b0c1-53e4b91250c8-2019-04-09T10:58:14+01:00
active · 17 January 2019

NHS England - Midlands and East Branded Medicines - Tranche B

NHS England · ocds-b5fd17-8aaddf75-dd22-4754-b241-885b44819814

Supplier named in award
UCB Pharma Ltd 208 Bath Road, Slough, Berkshire, SL1 3WE
Award value
£295,035,882
Contract period
1 March 2019 – 28 March 2021
Published
21 March 2019
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-8aaddf75-dd22-4754-b241-885b44819814-2019-03-21T11:50:47Z
active · 14 September 2018

NHS England Framework Agreement: South of England (Tranche B)

NHS England · ocds-b5fd17-3dac71e6-cde5-406b-abc4-e91389859bf5

Supplier named in award
UCB PHARMA LTD
Award value
£501,400,000
Contract period
1 September 2018 – 31 August 2020
Published
1 October 2018
Procedure
Open procedure (above threshold)
Main CPV
33600000
Source release ID
ocds-b5fd17-3dac71e6-cde5-406b-abc4-e91389859bf5-2018-10-01T08:55:31+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

21 records
Registered · UK00002565522

SELECTAJET

Owner UCB Pharma Limited · classes 5,10

Filed / designated
26 November 2010
Valid until / renewal due
26 November 2020
Open BritTM →
Registered · UK00002204096

METADATE

Owner UCB Pharma Limited · classes 5

Filed / designated
27 July 1999
Valid until / renewal due
27 July 2019
Open BritTM →
Registered · UK00002140705

CORACTEN XL

Owner UCB Pharma Limited · classes 5

Filed / designated
1 August 1997
Valid until / renewal due
1 August 2027
Open BritTM →
Registered · UK00001582378

MINIJET

Owner UCB Pharma Limited · classes 5

Filed / designated
17 August 1994
Valid until / renewal due
17 August 2021
Open BritTM →
Registered · UK00001251251

CORACTEN

Owner UCB Pharma Limited · classes 5

Filed / designated
1 October 1985
Valid until / renewal due
1 October 2026
Open BritTM →
Registered · UK00001162442

DIOCTYL

Owner UCB Pharma Limited · classes 5

Filed / designated
6 October 1981
Valid until / renewal due
6 October 2022
Open BritTM →
Dead · UK00002394726

MEDOCODENE

Owner UCB Pharma Limited · classes 5

Filed / designated
20 June 2005
Valid until / renewal due
20 June 2015
Open BritTM →
Dead · UK00002276768

OSMOLAX

Owner UCB Pharma Limited · classes 5

Filed / designated
1 August 2001
Valid until / renewal due
1 August 2011
Open BritTM →
Dead · UK00002272648

LAXAMAX

Owner UCB Pharma Limited · classes 5

Filed / designated
15 June 2001
Valid until / renewal due
15 June 2011
Open BritTM →
Dead · UK00002272649

LAX-MAX

Owner UCB Pharma Limited · classes 5

Filed / designated
15 June 2001
Valid until / renewal due
15 June 2011
Open BritTM →
Dead · UK00002104854

CORACTEN LA

Owner UCB Pharma Limited · classes 5

Filed / designated
11 July 1996
Valid until / renewal due
11 July 2006
Open BritTM →
Dead · UK00001582379

MINIJET

Owner UCB Pharma Limited · classes 10

Filed / designated
31 October 1994
Valid until / renewal due
31 October 2014
Open BritTM →
Dead · UK00001306547

MENZOL

Owner UCB Pharma Limited · classes 5

Filed / designated
7 April 1987
Valid until / renewal due
7 April 2008
Open BritTM →
Dead · UK00001162441

DERMACAINE

Owner UCB Pharma Limited · classes 5

Filed / designated
6 October 1981
Valid until / renewal due
6 October 2012
Open BritTM →
Dead · UK00001162443

HORMOFEMIN

Owner UCB Pharma Limited · classes 5

Filed / designated
6 October 1981
Valid until / renewal due
6 October 2012
Open BritTM →
Dead · UK00001106241

MediPharm

Owner UCB Pharma Limited · classes 5

Filed / designated
13 December 1978
Valid until / renewal due
13 December 2009
Open BritTM →
Dead · UK00000866753

MEDDOCODENE

Owner UCB Pharma Limited · classes 5

Filed / designated
13 July 1964
Valid until / renewal due
13 July 2009
Open BritTM →
Dead · UK00000766096

PULMODRINE

Owner UCB Pharma Limited · classes 5

Filed / designated
30 May 1957
Valid until / renewal due
30 May 2016
Open BritTM →
Dead · UK00000731576

HYPERTANE

Owner UCB Pharma Limited · classes 5

Filed / designated
25 June 1954
Valid until / renewal due
25 June 2013
Open BritTM →
Removed · UK00000714456

INSOMNOL

Owner UCB Pharma Limited · classes 5

Filed / designated
30 January 1953
Valid until / renewal due
30 January 2012
Open BritTM →
Dead · UK00000639680

TONIVITAN.

Owner UCB Pharma Limited · classes 5

Filed / designated
31 August 1945
Valid until / renewal due
31 August 2008
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 records0
PSC source and official link →
Corporate entityCurrent

Celltech Group 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
Companies Act 2006
Legal form
Company Limited By Shares
Place registered
Companies House
Registration number
02159282
Notified
6 April 2016
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
FTS

No exact GB-COH link in this snapshot

Find a Tender did not explicitly identify this Companies House number in a procurement party. BritDB did not attempt a name-only match.

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

0 procurement processes 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
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
ICO
ICO Register of Fee Payers

Privacy-reduced candidate associations based on a unique exact name-and-postcode match.

1 candidate record
CF
Contracts Finder OCDS

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

13 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.

0 exact processes
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.