Harmonia regulatória e barreiras comerciais

É quase impossível o Reino Unido conseguir ter, simultaneamente, ausência de barreiras comerciais com a UE e autonomia para estabelecer a sua própria regulamentação; mas, paradoxalmente, e existência de barreiras comerciais depende mais da autonomia em matéria regulatória do que propriamente de depois irem existir grandes diferenças concretas entre as regulamentações britanica e "unionista"

Flexibility does not come for free, por Sam Lowe (Center for European Reform):

Unilateral UK alignment with EU rules post-Brexit does have benefits for businesses: it avoids a situation whereby they have to produce to two different sets of rules when selling to both markets. It does not, however, lead to a substantive reduction in regulatory barriers to trade, if the UK has secured the ability to diverge if it wants to. For example, once the UK is outside of the EU’s food hygiene (SPS) regime, British exports of products of animal origin will face new regulatory controls at the EU border in the form of new paperwork and physical inspections. This will occur whether the UK applies the same food hygiene regime in practice or not. Thus, the upfront costs of being outside of the EU’s SPS regime are large. However, if the UK does then decide to diverge, and, for example, accept US production methods, this would not lead to a significantly larger increase in trading friction with the EU. The additional trade costs associated with choosing to diverge are large; the relative costs of then actually diverging are smaller.

To give another example, the moment the UK is outside of the EU’s single market, even if British producers continue to produce to EU standards, they will not be able to place them directly on the European market. Instead they will need an EU-established entity to take on the legal responsibility for ensuring the product complies with EU product rules. This could be the EU-based importer or an EU-based legal representative of the British company. No longer being able to place products directly on the EU market creates an additional cost for British businesses selling to Europe, no matter what the UK’s domestic regime. Whether the UK then decides to introduce its own product standards (as is currently the ambition), or accepts certain US standards, the barriers facing British exporters selling to the EU remain the same.