Windsor Framework - Help!

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Topic summary

A UK seller is seeking guidance on complying with Windsor Framework regulations taking effect May 1, 2025, which introduce different rules for shipping to Northern Ireland based on transaction type: B2C, B2B under £135, and B2B over £135.

Key concerns include:

  • Whether their existing IOSS registration (through EAS systems) is necessary or complicating matters
  • How to configure their third-party dispatch system (Baselinker) to handle the different scenarios based on weight and value
  • Considering stopping sales to NI and EU entirely due to complexity

An EAS representative clarified that the Windsor Framework actually simplifies previous requirements, and importantly, IOSS registration is not relevant for UK mainland to Northern Ireland transactions, which are treated as domestic sales.

The discussion remains ongoing as the seller continues working through implementation details with the service provider.

Summarized with AI on October 29. AI used: claude-sonnet-4-5-20250929.
1

What is anyone doing about the Windsor Framework? The new regulations come into affect on the 1st May 2025. Looking at Royal Mail’s website there are three different scenarios that apply to us. (Easier to understand than the HMRC website)

B2C, B2B (under £135), B2B (over £135). Each Scenario has a different set of rules.

We have an IOSS number (through EAS systems) but I wonder if being registered with IOSS is over complicating things…

To complicate things we use a third party dispatch system - Baselinker - that decides how things are sent based on weight and value so I need to brief the IT guys to write the script.

Very confused? What is anyone esle doing? (Tempted to close NI and EU sales…)

2

Hi ShirleyScott!

Windsor Framework is in fact a simplification to the mess. IOSS plays no role for sales from UK mainland to Northern Ireland, it considered correctly as a domestic transaction.

3

Thank you Teemu. I opened this chat before our conversation. Thanks for your help so far.