Post-Brexit, shipping to the UK from the US requires a commercial invoice, customs declaration, and either a UK VAT number or use of Amazon's VAT calculation service for FBA.
The fastest route from South Florida to the UK is DHL Express or FedEx International Priority — typically 2–4 business days. For larger shipments, freight consolidation through Miami International Airport is cost-effective.
Amazon UK FBA prep follows mostly the same FNSKU and packaging requirements as Amazon US, with some differences in carton label formatting and FC assignment.
Using a Florida 3PL with international shipping experience removes the administrative complexity. The warehouse handles documentation, carrier selection, and dispatch while you focus on selling.