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The London Rails blog.

Notes on payment rails, Banking-as-a-Service and staying compliant across the UK and Europe.

16 Sep 2026 · 6 min read

Virtual IBAN Provider: What the IBAN Number Actually Identifies

A virtual IBAN doesn't open a new bank account; it identifies a ledger entry under one. Here's what that distinction means in practice.

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15 Sep 2026 · 6 min read

Banking as a Service UK: Where SWIFT Fits Alongside Local Rails

How cross-border SWIFT payments work alongside domestic UK and EU rails, and what this means for platforms using Banking as a Service infrastructure.

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14 Sep 2026 · 6 min read

Payment Reconciliation Automation: Where Matching Logic Breaks Down

A practical look at the integration mistakes that cause automated payment reconciliation to fail, and how to design matching logic that holds up.

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13 Sep 2026 · 5 min read

Safeguarding Client Funds: E-Money Rules vs Client Money Accounts

Two distinct UK regimes protect customer money differently: e-money safeguarding and CASS client money accounts. Here is how each works and when it applies.

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12 Sep 2026 · 6 min read

Multi-Currency Accounts for Platforms: Matching Currency to Payment Rail

How platforms should think about currency coverage, local rail access and reconciliation when building multi-currency accounts for cross-border flows.

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11 Sep 2026 · 6 min read

Confirmation of Payee API: Handling Match, Close and No-Match Codes

A practical look at how product teams should interpret and act on Confirmation of Payee API responses, not just receive them.

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10 Sep 2026 · 6 min read

Verification of Payee SEPA vs UK Confirmation of Payee: Key Differences

A practical comparison of EU Verification of Payee and UK Confirmation of Payee, and what the differences mean for platforms paying out across both.

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9 Sep 2026 · 6 min read

Faster Payments API Access: Scheme Limits, Cut-offs and Returns

A practical look at the scheme rules behind Faster Payments API access, covering value limits, settlement timing, returns and fraud liability.

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8 Sep 2026 · 6 min read

SEPA Instant Payments API: Handling Timeouts, Limits and Fallbacks

What happens when a SEPA Instant payment cannot complete in real time, and how a well-built API should handle rejections, limits and fallback routing.

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7 Sep 2026 · 6 min read

Embedded Finance Platforms: Who Holds the Money, Who Is Liable

A practical look at the regulatory structure behind an embedded finance platform, and who actually answers for the money.

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6 Sep 2026 · 5 min read

Virtual IBAN Provider Models: Direct Scheme Access or Aggregation

Every virtual IBAN provider gets its numbers into the banking system one of two ways, and the difference shapes speed, cost and control.

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5 Sep 2026 · 6 min read

Banking as a Service UK: How Marketplace Payouts Move End to End

A step-by-step look at what happens between a marketplace sale and a seller payout, and where UK Banking as a Service infrastructure fits.

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4 Sep 2026 · 6 min read

Payment Reconciliation Automation: Two Approaches Compared

A comparison of reference-based and statement-parsing methods for payment reconciliation automation, and when each fits a platform's flows.

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3 Sep 2026 · 6 min read

Safeguarding Client Funds: A Due Diligence Guide for Platform Teams

What platforms should actually check before trusting a provider's safeguarding claims, and why the paperwork matters as much as the mechanism.

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1 Sep 2026 · 6 min read

Multi-Currency Accounts for Platforms: Pooled or Segregated?

A practical comparison of pooled and currency-segregated account structures, and how platforms should choose between them for payouts and client money.

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31 Aug 2026 · 6 min read

Verification of Payee SEPA: Handling Mismatches in Payout Flows

A practical look at what platforms should do when a SEPA Verification of Payee check returns a mismatch, a close match, or no result at all.

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30 Aug 2026 · 6 min read

Confirmation of Payee API for Payouts: Common Integration Mistakes

How platforms running marketplace payouts get Confirmation of Payee API integration wrong, and what a working setup actually needs to handle.

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29 Aug 2026 · 6 min read

Faster Payments API Access: What Happens Between Call and Credit

A practical walkthrough of what a Faster Payments API call actually triggers, from message validation to funds landing in a UK account.

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28 Aug 2026 · 6 min read

Integrating a SEPA Instant Payments API: What Product Teams Must Plan For

A practical look at the design decisions behind a SEPA Instant payments API, from regulatory deadlines to fallback handling and reconciliation.

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21 Aug 2026 · 6 min read

Embedded Finance Platform Payments: What Happens Behind the Button

A walkthrough of what actually happens when a user pays or gets paid inside an embedded finance platform, from account issuance to settlement.

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20 Aug 2026 · 5 min read

Virtual IBAN Provider Integration: Five Mistakes That Break Payments

A practical look at the integration errors that cause failed payments and reconciliation problems when connecting to a virtual IBAN provider.

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19 Aug 2026 · 6 min read

Banking as a Service UK: Single Provider or Multi-Rail Stack

A practical look at two ways UK platforms assemble Banking as a Service infrastructure, and how to judge which suits your payment volumes and geography.

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18 Aug 2026 · 6 min read

Payment Reconciliation Automation: How It Actually Works

How automated reconciliation matches incoming payments to ledger entries across bank rails, and why manual matching breaks down at volume.

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17 Aug 2026 · 6 min read

Safeguarding Client Funds: How E-Money Segregation Actually Works

A practical look at how e-money institutions segregate and protect client funds, and what platforms should check before relying on the arrangement.

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16 Aug 2026 · 6 min read

Multi-Currency Accounts for Platforms: How They Actually Work

A practical look at how multi-currency accounts let platforms collect and pay out in several currencies without opening a bank account in every market.

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15 Aug 2026 · 6 min read

Verification of Payee SEPA: How the EU's Name-Check Scheme Works

A practical look at how Verification of Payee works under SEPA, why it exists, and what it means for payment platforms operating across the eurozone.

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14 Aug 2026 · 6 min read

Confirmation of Payee API: How the Name-Matching Check Works

A practical look at how the Confirmation of Payee API checks account names before a payment is sent, and where it fits in a payments stack.

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13 Aug 2026 · 6 min read

Faster Payments API Access: Direct Membership vs Indirect Routes

A practical look at how businesses actually get Faster Payments API access, what happens to a payment end to end, and where integrations go wrong.

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12 Aug 2026 · 6 min read

Embedded Finance Platform: What It Actually Involves to Build

An embedded finance platform is more than a payments button — here's what sits underneath one and how the build-versus-buy decision actually works.

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11 Aug 2026 · 6 min read

SEPA Instant Payments API: How the Rail Actually Works

A practical look at how SEPA Instant payments move through the scheme, and what a good API needs to handle.

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9 Aug 2026 · 6 min read

Choosing a Virtual IBAN Provider: What Actually Sits Behind the Number

A practical guide to what differs between virtual IBAN providers, from account structure to scheme membership, and what to check before you integrate.

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8 Aug 2026 · 6 min read

Banking as a Service UK: How the Infrastructure Actually Fits Together

A practical breakdown of how Banking as a Service UK infrastructure works, from scheme membership to marketplace payouts.

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25 Jun 2026 · 1 min read

What is a virtual IBAN, and why does reconciliation get easier?

Virtual IBANs give every customer a unique account number that points at one underlying account — turning a reconciliation headache into an automatic match.

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12 Jun 2026 · 1 min read

Faster Payments, SEPA and SWIFT: which rail does your money take?

A plain-English guide to the three payment rails behind modern UK and European transfers — what each is for, how fast it settles, and when to use which.

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