People search UK Revenue & Customs data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 UK Revenue & Customs-linked incident, with headline counts up to 25M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why UK Revenue & Customs breach history matters
UK Revenue & Customs operates in Government (United Kingdom). Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2007 — 25M child benefit records lost
Cataloged incident. Two discs with 25M records (7.25M families) sent unregistered via TNT to NAO; never arrived. Names, addresses, DOB, NI numbers, bank details. Weak WinZip password. Led to Data Protection Act 2009. Exposed categories include Names, addresses, DOB, NI numbers, bank details. BreachHistory cites approximately 25M+ affected records in this row. See the hmrc2007 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple UK Revenue & Customs catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Bookmark the UK Revenue & Customs company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/hmrc · Latest: hmrc2007.
Sources: BreachHistory catalog (1 row for UK Revenue & Customs), company and regulator disclosures cited in individual breach records.