Post-Brexit UK-EU shipping rules for Manchester merchants?

Yes, this is the most under-estimated Manchester-rebuild scope, especially because fast-fashion DTC has thin margins and customs friction kills conversion. Post-Brexit (since Jan 2021), UK is outside the EU VAT zone. Three rule sets matter: (1) UK-to-EU orders under €150 use EU IOSS (Import One-Stop Shop), you collect EU VAT at checkout, file one quarterly return; orders over €150 go through standard customs at the EU border, brutal for boohoo-scale Manchester DTC because the customer pays at delivery. (2) EU-to-UK orders have a £135 threshold below which the UK seller collects UK VAT, above which the buyer pays at import. (3) NI Protocol, Northern Ireland still sits in the EU VAT zone for goods, so NI-to-EU is intra-community, but NI-to-GB is interstate. We wire all three rule sets into Magento via custom tax-rule logic + IOSS-compliant invoice templates + post-Brexit carrier rules (DHL / DPD UK / Royal Mail / Hermes-Evri with EU customs pre-clearance) + transparent landed-cost messaging at PDP.