Sources & research notes.
Follow the public documentation behind the explanations. These sources describe products, guidance and published methods.
Our research and preserved records.
Education edition prepared: 31 October 2026. This website brings together our educational research, technical explanations and public sources.
Our original research, correspondence, disclosures, timelines and case documents are preserved privately while we follow the relevant processes. Keeping that material separate from this public resource does not mean it has been discarded or that the matters it concerns have been resolved.
We will provide updates when appropriate and add further research and examples as they are reviewed.
Source dates help readers place an explanation in its proper context. Product documentation and guidance can change, so compare the version and rules relevant to the event you are examining.
Public reference directory.
Links are carried forward from the explanatory pages. Their inclusion is not an independent audit or endorsement of a provider’s practices.
- Official technical source ↗
Used in: Follow a data journey, Interactive explanations, 20 technical questions, Connections & customer knowledge, Roles & responsibility, The value of linked data
- Sigma overview ↗
Used in: Follow a data journey, Connections & customer knowledge
- Fraud analysis and reporting fields ↗
Used in: Follow a data journey, Connections & customer knowledge
- Scheduled query results ↗
Used in: Follow a data journey
- Transactional data and customer joins ↗
Used in: Follow a data journey, Roles & responsibility
- Stripe: metadata and copying rules ↗
Used in: Follow a data journey, Interactive explanations, 20 technical questions, Connections & customer knowledge
- ICO: pseudonymisation ↗
Used in: Follow a data journey, 20 technical questions, Closed user groups & benefits
- ICO: indirect identification ↗
Used in: Follow a data journey
- FOS: fraud-marker complaints ↗
Used in: Interactive explanations
- Read the FOS case study ↗
Used in: Interactive explanations
- Cifas: processing, consequences and retention ↗
Used in: Interactive explanations
- ICO: accuracy of personal information ↗
- EMVCo history ↗
Used in: Interactive explanations
- FCA announcement ↗
Used in: Interactive explanations
- Visa’s dated bulletin ↗
Used in: Interactive explanations
- EMVCo: channels, messages and privacy responsibilities ↗
Used in: Interactive explanations, 20 technical questions, Connections & customer knowledge
- Visa: authentication, authorisation and the evolution of 3DS ↗
Used in: Interactive explanations
- ICO: responsibilities alongside international-transfer rules ↗
Used in: Interactive explanations
- Companies Act 2006, section 81 ↗
Used in: Interactive explanations, Reading names & records, Article 02 · Reward company identity, Article 03 · Corporate changes & records
- GOV.UK: registered office requirements ↗
Used in: Interactive explanations
- ICO: getting information corrected ↗
- ICO: restricting use ↗
Used in: Interactive explanations
- Configured destinations ↗
Used in: 20 technical questions
- Personal records and supporting information ↗
Used in: 20 technical questions
- What is personal data? ↗
Used in: 20 technical questions
- Identifiers and customer traits ↗
Used in: 20 technical questions
- Device context and separate authentication ↗
Used in: 20 technical questions
- Merchant-visible risk outcomes ↗
Used in: 20 technical questions
- Event notifications and delivery ↗
Used in: 20 technical questions
- Roles for each processing activity ↗
- Events and their properties ↗
Used in: 20 technical questions
- Observed and inferred information; intelligibility ↗
Used in: 20 technical questions
- Reporting and CSV exports ↗
Used in: 20 technical questions
- Access and data sharing ↗
Used in: 20 technical questions
- Transforming destination events ↗
Used in: 20 technical questions
- Finding and retrieving information ↗
Used in: 20 technical questions
- Further purposes ↗
Used in: 20 technical questions, Connections & customer knowledge
- Ordinary legitimate interests ↗
Used in: 20 technical questions
- Recognised legitimate interest ↗
Used in: 20 technical questions, Consumer & SME transparency
- Deletion and suppression coverage ↗
Used in: 20 technical questions
- Event delivery visibility ↗
Used in: 20 technical questions
- Radar analytics
Used in: 20 technical questions
- ICO: when to provide privacy information
Used in: 20 technical questions
- ICO: relevant SAR exemptions
Used in: 20 technical questions
- ICO: business-to-business marketing
Used in: 20 technical questions
- ICO: controllers and processors
Used in: 20 technical questions, Connections & customer knowledge, Roles & responsibility, Reading names & records
- Authentication data categories and conditional fields
Used in: Connections & customer knowledge
- Review API fields and authenticated access
Used in: Connections & customer knowledge
- Configured cross-region and cross-cloud replication
Used in: Connections & customer knowledge
- Sharing across regions and cloud platforms
Used in: Connections & customer knowledge
- Invoice creation from storefront orders
Used in: Connections & customer knowledge
- CRM-to-destination connector and field access
Used in: Connections & customer knowledge
- Marketing-platform profile fields
Used in: Connections & customer knowledge
- Published demographic-enrichment example
Used in: Connections & customer knowledge
- Platform and connected-account events
Used in: Connections & customer knowledge, Roles & responsibility, Closed user groups & benefits
- Platform/connected-account charge arrangements
Used in: Connections & customer knowledge, Roles & responsibility
- CMA research on algorithmic competition risks
Used in: Connections & customer knowledge, Consumer & SME transparency
- ICO: who the UK GDPR applies to ↗
Used in: Roles & responsibility
- ICO: international transfers ↗
Used in: Roles & responsibility
- ICO: sharing information for fraud prevention
Used in: Roles & responsibility, Consumer & SME transparency, The value of linked data, Closed user groups & benefits
- ICO fairness and transparency guidance ↗
Used in: Consumer & SME transparency
- Data (Use and Access) Act 2025 ↗
Used in: Consumer & SME transparency
- Section 71: purpose limitation ↗
Used in: Consumer & SME transparency
- ICO: compatibility and reuse ↗
Used in: Consumer & SME transparency
- GOV.UK: commencement dates ↗
Used in: Consumer & SME transparency
- Tesco Media / dunnhumby
Used in: The value of linked data
- Tesco privacy and cookies policy
Used in: The value of linked data
- NCSC data-breach guidance
Used in: The value of linked data
- Home Office guidance on failure to prevent fraud
Used in: The value of linked data
- Planit, Importance of Closed User Groups
Used in: The value of linked data, Closed user groups & benefits
- Impact Contribution Report documentation
Used in: The value of linked data
- AppsFlyer incrementality experiment documentation
Used in: The value of linked data
- Name history ↗
Used in: Reading names & records, Public records & research examples
- 2022 filings ↗
Used in: Reading names & records
- Name history ↗
Used in: Reading names & records, Public records & research examples
- 2022 filings ↗
Used in: Reading names & records
- Name history ↗
Used in: Reading names & records, Public records & research examples
- 2022 filings ↗
Used in: Reading names & records
- Original accounts, cover page ↗
Used in: Reading names & records
- Original accounts, cover page ↗
Used in: Reading names & records, Public records & research examples
- Original accounts, cover page ↗
Used in: Reading names & records, Public records & research examples
- Original three-page filing: certificate and resolution ↗
Used in: Reading names & records, Public records & research examples
- Taste Marketing · control register
Used in: Reading names & records, Public records & research examples
- Open the two PSC entries ↗
Used in: Reading names & records, Public records & research examples
- PSC07 ↗
Used in: Reading names & records
- PSC05 ↗
Used in: Reading names & records
- PSC02 ↗
Used in: Reading names & records
- December PSC05 ↗
Used in: Reading names & records
- Read the complete State Debtco filing sequence ↗
Used in: Reading names & records, Public records & research examples
- Debenture dated 3 August 2015 ↗
Used in: Reading names & records
- Debenture dated 13 November 2024 ↗
Used in: Reading names & records
- 31 January 2026 ↗
Used in: Reading names & records
- 24 June 2026 ↗
Used in: Reading names & records
- 29 August 2026 ↗
Used in: Reading names & records
- Open the linked SH01 and replacement application ↗
Used in: Reading names & records
- Compare the register annotations ↗
Used in: Reading names & records, Public records & research examples
- Spark history ↗
Used in: Reading names & records, Article 03 · Corporate changes & records
- Ello Group replacement PSC02 ↗
Used in: Reading names & records
- Saving pages guide ↗
Used in: Reading names & records
- Open Wayback Machine ↗
Used in: Reading names & records
- Read the transparency requirements ↗
Used in: Closed user groups & benefits, Article 01 · Corporate cinema ticket journeys, Article 02 · Reward company identity
- ICO: valid consent
Used in: Closed user groups & benefits
- Planning direct marketing
Used in: Closed user groups & benefits
- ICO: the right to object
Used in: Closed user groups & benefits
- iCOUNTER: research report, 25 August 2026 ↗
Used in: Closed user groups & benefits
- Cybernews: reported data categories and linkage ↗
Used in: Closed user groups & benefits
- Read the original public thread ↗
Used in: Closed user groups & benefits
- Stripe: API key access and incident handling ↗
Used in: Closed user groups & benefits
- Stripe: connected-platform access and revocation ↗
Used in: Closed user groups & benefits
- Read the migration guide ↗
Used in: Closed user groups & benefits
- Compare the prior terms, PDF pages 9–10 ↗
Used in: Closed user groups & benefits
- Read the notice ↗
Used in: Closed user groups & benefits
- Read the researchers’ account ↗
Used in: Closed user groups & benefits
- Read the UK agreement ↗
Used in: Closed user groups & benefits
- Read the applicability and notification dates ↗
Used in: Closed user groups & benefits
- API permissions and access policies ↗
Used in: Closed user groups & benefits
- Privacy roles and retention ↗
Used in: Closed user groups & benefits
- ICO: deciding controller and processor roles ↗
Used in: Closed user groups & benefits
- ICO: tracking technologies and link decoration
Used in: Closed user groups & benefits
- Tracking within email
Used in: Closed user groups & benefits
- ICO: profiling and enrichment ↗
Used in: Closed user groups & benefits
- Linkability and identifiability
Used in: Closed user groups & benefits
- NPSA: digital footprints and online targeting
Used in: Closed user groups & benefits
- Protecting information about you
Used in: Closed user groups & benefits
- Recognising targeted approaches
Used in: Closed user groups & benefits
- HMRC VAT Notice 700/7, section 9 ↗
Used in: Closed user groups & benefits
- ICO handles data-protection concerns
Used in: Closed user groups & benefits
- ASA advertising and promotion complaints
Used in: Closed user groups & benefits
- CMA reporting guidance
Used in: Closed user groups & benefits
- Read the ASA ruling and response →
Used in: Public records & research examples
- Company RNS announcement held by the FCA
Used in: Public records & research examples, Article 03 · Corporate changes & records
- Acquisition adviser's published account
Used in: Public records & research examples
- 09578541 · Filing document
Used in: Public records & research examples
- 09578541 · Filing document
Used in: Public records & research examples
- 03940640 · Filing document
Used in: Public records & research examples
- 03940640 · Filing document
Used in: Public records & research examples
- 03940640 · Filing document
Used in: Public records & research examples
- 05545626 · Filing document
Used in: Public records & research examples
- 05545626 · Filing document
Used in: Public records & research examples
- 09685583 · Filing document
Used in: Public records & research examples
- 09685583 · Filing document
Used in: Public records & research examples
- 03988503 · Filing history
Used in: Public records & research examples
- 05119718 · Filing history
Used in: Public records & research examples
- 05119718 · Control register
Used in: Public records & research examples
- DNS record reference
- CNAME records — aliasing explained
- Companies House — check a company and its name history
Used in: Article 02 · Reward company identity
- LSE · AIM Rules for Companies
- LSE · AIM Rules for Nominated Advisers
- LSE · SETSqx trading service
- Companies House · accounts and subsidiary exemptions
- Issuer results centre · compare successive annual and interim reports
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