The article explores how the UK and EU might maintain benefits of the Customs Union and Single Market in certain sectors post-Brexit. By creating a broad tariff-free Free Trade Area (FTA), they could coordinate external tariffs, relax rules of origin, and establish mutual recognition agreements for trade. This could open up deeper services trade in some sectors, though not at current levels. Such an FTA would still fall short of the market access levels seen within the EU, continuing some limitations on the UK's independent trade policy.