Sorry @afneil but even if the UK were to leave the transition period without an agreement, it would not have 'total regulatory freedom' as you claim. The UK has signed up to many international conventions & is thereby bound by rules which set global or regional standards 1/
Many of these rules constrain what the UK Government could do, from WTO most favoured nation principle to the ISPM-15 standard for pallets and the CITES convention for endangered species, AETR rules for professional drivers to the WCO Safe Framework and many, many more besides 2/ 
We all live in a globalised & rules-based world, and I don't think that many countries have full & absolute regulatory freedom these days. So let's not pretend it would be the case or that the only thing required would be to leave the transition without an agreement in place.
