11 UK revenue entry points · 8 tax & customs priorities · 6 DEFONEOS MCPs · HMRC / Border Force / Valuation Office backbone
UK revenue and customs is governed by the Taxes Management Act 1970, the Customs and Excise Management Act 1979, the Income Tax (Earnings and Pensions) Act 2003, the Corporation Tax Act 2010, the Value Added Tax Act 1994, the Finance Act annual legislation, the Customs (Transition) Regulations 2020 (post-Brexit), the Taxation (Cross-border Trade) Act 2018, and the 2025 HMRC Tax Administration Framework Review. HM Revenue & Customs (HMRC) collects over £810bn annually in tax receipts (~95% of government income), administers 40+ tax regimes (income tax, corporation tax, VAT, capital gains, inheritance tax, stamp duty, excise duties, NICs, Child Benefit, Tax Credits), employs ~65,000 staff, processes 12+ million Self Assessment returns, manages 60+ million individual tax records, and collects £40bn+ in customs duties and excise. The 2025 Charter mandates digital-first tax administration with fraud detection, anti-money-laundering compliance, and taxpayer fairness. DEFONEOS delivers the UK's first open-source Sovereign Public Services OS purpose-built for revenue & customs — sovereign tax provenance chains, BFT-governed fraud detection, customs automation, taxpayer fairness verification, and AI-augmented compliance.
All entries are BFT-signed (Ed25519 / RFC 8032 / 2026-Q3 rotation) and curl-verifiable. Per-entry contacts sourced from HMRC + Border Force + Valuation Office + PSN (2026-Q1).
| # | Entry point | Location | Function | DEFONEOS fit |
|---|---|---|---|---|
| E1 | HMRC — Customer Strategy & Tax Design (CSTD) | London | Tax policy design · Making Tax Digital · Charter compliance | DEFONEOS MCPs: data-gov-uk-mcp · bft-council-probe — tax design + BFT |
| E2 | HMRC — Fraud Investigation Service (FIS) | Birmingham / Nationwide | Tax fraud investigation · criminal/civil evasion · £5bn+ yield | DEFONEOS MCPs: bft-council-probe · sovereign-keystore — fraud evidence + BFT chain |
| E3 | HMRC — Customer Services Group (CSG) | Newcastle / Liverpool / Nationwide | Taxpayer services · Self Assessment · PAYE · VAT | DEFONEOS MCPs: data-gov-uk-mcp · mqtt-bridge — taxpayer data + service telemetry |
| E4 | HMRC Border Force — Customs | Nationwide ports | Customs declarations · CDS · excise · prohibited goods | DEFONEOS MCPs: data-gov-uk-mcp · sentinel-hub-mcp — customs + port EO |
| E5 | HMRC — Wealthy & Mid-Sized Business Compliance (WMBC) | London | High-net-worth + mid-corp compliance · transfer pricing | DEFONEOS MCPs: companies-house-mcp · bft-council-probe — corp compliance + BFT |
| E6 | Valuation Office Agency (VOA) | London / Nationwide | Business rates · council tax bands · property valuation | DEFONEOS MCPs: data-gov-uk-mcp · sentinel-hub-mcp — property + EO valuation |
| E7 | HMRC — Making Tax Digital (MTD) | London | Digital tax reporting · ITSA · VAT MTD · bridging software | DEFONEOS MCPs: data-gov-uk-mcp · sovereign-keystore — MTD provenance + chain |
| E8 | HMRC — Counter-Avoidance (CAS) | London / Nationwide | Tax avoidance schemes · DOTAS · Accelerated Payments | DEFONEOS MCPs: bft-council-probe · sovereign-keystore — avoidance evidence + BFT |
| E9 | National Crime Agency — Economic Crime (NCA) | London | Money laundering · SARs · tax crime · UWOs | DEFONEOS MCPs: bft-council-probe · sovereign-keystore — AML evidence + BFT |
| E10 | Insolvency Service | London / Birmingham | Phoenix companies · director disqualification · tax debt | DEFONEOS MCPs: companies-house-mcp · bft-council-probe — insolvency + BFT |
| E11 | Financial Conduct Authority (FCA) — Consumer Credit | London | Tax-related financial crime · consumer credit · APP fraud | DEFONEOS MCPs: companies-house-mcp · bft-council-probe — FCA + BFT |
| # | Priority | Owning body | DEFONEOS MCP coverage | Alignment cross-walk |
|---|---|---|---|---|
| P1 | Making Tax Digital (MTD) full rollout | HMRC CSTD | data-gov-uk-mcp · sovereign-keystore | MTD ITSA · VAT MTD · digital record-keeping · provenance |
| P2 | Tax fraud & evasion detection (£5bn yield) | HMRC FIS | bft-council-probe · sovereign-keystore | FIS yield · Connect risk engine · BFT evidence chain |
| P3 | Customs modernisation (CDS · GVMS · 2025 Border Target Operating Model) | HMRC Border Force | data-gov-uk-mcp · mqtt-bridge | CDS · GVMS · SPS checks · port automation |
| P4 | Tax avoidance scheme disruption (DOTAS) | HMRC CAS | bft-council-probe · sovereign-keystore | DOTAS · Accelerated Payments · GAAR · BFT |
| P5 | Transfer pricing & corporate tax compliance | HMRC WMBC | companies-house-mcp · bft-council-probe | BEPS · Pillar Two · corporate group structures · BFT |
| P6 | Money laundering & SARs modernisation | NCA / HMRC / FCA | bft-council-probe · sovereign-keystore | MLR 2017 · SARs · UWOs · BFT chain |
| P7 | Business rates & property valuation reform | VOA / DLUHC | data-gov-uk-mcp · sentinel-hub-mcp | VOA revaluation · property data · EO valuation |
| P8 | Taxpayer Charter & fairness (AI bias prevention) | HMRC CSTD | bft-council-probe · sovereign-keystore | HMRC Charter · fairness principles · BFT audit |
| # | MCP server | Category | Description |
|---|---|---|---|
| 1 | data-gov-uk-mcp | Tax Open Data Infrastructure | HMRC tax statistics · ONS fiscal data · MTD filing data · VAT data · customs tariff schedules · excise duty records · regional tax yield |
| 2 | bft-council-probe | Fraud & Compliance Governance | 33-agent BFT chain for fraud investigation evidence · tax avoidance determinations · AML SARs adjudication · Connect risk-scoring audit · transfer pricing dispute resolution |
| 3 | sovereign-keystore | Tax Provenance & Digital Chain | Ed25519-signed MTD filing provenance · customs declaration anchoring · DOTAS scheme registration chains · accelerated payment notices · UWO evidence vault |
| 4 | companies-house-mcp | Corporate Tax & Insolvency Vetting | Corporate group structures · beneficial ownership · phoenix company detection · director disqualification records · transfer pricing entity mapping · insolvency-linked tax debt |
| 5 | sentinel-hub-mcp | Customs & Property EO Verification | Copernicus port monitoring · supply chain verification · VOA property valuation EO evidence · undeclared structures detection · cross-border goods flow tracking |
| 6 | mqtt-bridge | Port & Service Telemetry | Border Force port telemetry · GVMS transit data · HMRC service performance metrics · real-time customs declaration throughput · queue and clearance monitoring |
The UK revenue and customs digital backbone spans HMRC's Connect risk engine (one of the world's largest data-mining systems, linking 30+ data sources including banks, Land Registry, Companies House, DVLA, and taxpayer records), the Customs Declaration Service (CDS) for all import/export declarations, the Goods Vehicle Movement Service (GVMS) for border transit, the Making Tax Digital (MTD) platform for digital tax reporting, the Personal Tax Account / Business Tax Account / Agent Online Self Serve, the Valuation Office Agency's property valuation database, the HMRC Fraud Investigation Service case management, the Counter-Avoidance Scheme (DOTAS) registry, the NCA SARs Online portal, the Companies House PSC register, and the 2025 Border Target Operating Model infrastructure. The 2025 Tax Administration Framework Review mandates AI-augmented compliance with fairness, transparency, and bias prevention. DEFONEOS integrates via BFT-governed fraud evidence, sovereign tax provenance chains, customs automation, and Connect risk-scoring audit. All evidence is curl-verifiable at the protocol layer.
| Step | Action | Owner | Time | Evidence |
|---|---|---|---|---|
| 1 | Buyer identifies tax compliance / customs / fraud detection / MTD requirement | Buyer | — | Requirement document |
| 2 | CSOAI sends DEFONEOS HMRC revenue pack + 30-day pilot pricing (T1 £2,840 / T2 £9,150 / T3 £28,400) | CSOAI | 1 hour | This page (curl-verifiable) |
| 3 | Buyer reviews BFT fraud evidence chain + MTD provenance + HMRC/FIS/CAS alignment | Buyer | 2-4 hours | curl -s /health + revenue pack |
| 4 | Submit compliance framework / FIS evidence / MTD integration | Buyer | 1-2 hours | Procurement pack |
| 5 | CSOAI provisions revenue-sovereign VM + DEFONEOS substrate + fraud evidence chain | CSOAI | <24 hours | AG-1: curl -s /health HTTP 200 |
⚠️ HARD RED-LINE: DEFONEOS handles OFFICIAL and OFFICIAL-SENSITIVE revenue & customs data ONLY. No individual taxpayer mass surveillance. No algorithmic bias or discriminatory risk-scoring against protected groups. No tax data exfiltration to non-HMRC actors. No facilitation of tax evasion, money laundering, or customs fraud. No personal financial profiling of individuals without lawful authority (RIPA 2000 / Investigatory Powers Act 2016). AI supports fraud investigation evidence integrity, MTD filing provenance, customs automation, Connect risk-scoring audit, and taxpayer fairness verification — never individual surveillance, algorithmic discrimination, or data exfiltration. All revenue evidence is BFT-governed with 23/33 quorum and independently verifiable. DEFONEOS strictly supports the HMRC Charter, the Tax Administration Framework, the MLR 2017, and the Investigatory Powers Act 2016.
| Buyer type | Entry point | Procurement vehicle | Security requirement | Pilot tier |
|---|---|---|---|---|
| HMRC (core dept) | E1 / E3 / E7 | HMRC GCF framework · Crown Commercial | OFFICIAL-SENSITIVE | T2/T3 |
| HMRC FIS / Fraud investigation | E2 | HMRC FIS framework · direct | SECRET | T3 |
| HMRC Border Force / Customs | E4 | HMRC Border framework · CDS integration | OFFICIAL-SENSITIVE | T2/T3 |
| HMRC WMBC / Corporate compliance | E5 | HMRC compliance framework | OFFICIAL-SENSITIVE | T2/T3 |
| Valuation Office Agency | E6 | VOA framework · direct | OFFICIAL | T1/T2 |
| NCA / FCA / Insolvency | E9 / E10 / E11 | NCA framework · FCA framework · Insolvency | OFFICIAL-SENSITIVE | T2/T3 |