The UK has a well-developed marketplace ecosystem giving international brands multiple routes to UK consumers. Amazon UK is the largest single marketplace — commanding the majority of UK online retail traffic — and for most international brands it is the obvious starting point. A UK 3PL enables you to list as Fulfilled by Merchant (FBM) or Seller Fulfilled Prime from day one, without sending stock into FBA, giving you greater flexibility during the early stage of testing UK demand and product-market fit.
eBay UK remains significant for certain product categories including automotive, tools, collectibles and secondhand goods. OnBuy is a growing UK-only marketplace that is less saturated than Amazon, attracting growing seller interest particularly in home, garden and technology. TikTok Shop UK is the fastest-growing new channel in 2025 — particularly for beauty, fashion and lifestyle products — but requires reliable same-day dispatch to meet TikTok's delivery SLAs and protect your seller metrics.
The recommended multi-channel sequence for most international brands entering the UK is: start with Amazon FBM or SFP to test product-market fit with low upfront commitment, add a Shopify DTC store for brand-building and margin, and layer in additional marketplaces as you gain UK traction. A UK 3PL like PackPro fulfils all channels from a single stock pool, eliminating the need to split inventory and significantly simplifying your UK logistics operation from day one.