International trade requires a level of regulatory alignment, particularly when it comes to things like safety standards and food quality. We impose minimum standards on other countries, and, (when in the EU) were a driving force for many of the regulatory safety standards that are now commonplace. In many instances, our current standards are already higher.
The country/politicians/business people will have a choice (which I thought is what everyone wanted with Brexit), we can meet certain standards to trade with certain countries, or we walk away and find a country with lower regulatory standards. That's our decision now. Appreciate this may not be the Brexit people want, but things have changed significantly since the vote, a war in Ukraine and Trump as President, means we need to find some allies to trade with and protect each other. 2016, a European army was used as weapon against the EU. Given the sh*t state of our armed forces (not the troops) following years of underinvestment, I'd be banging the door down!