@WouldBeGood I disagree. Hard border means more controls than soft border. Dairy and meat products could go across the border if Scotland and England were independent. It’s just a matter of organising.
Whatever controls are in place now for dairy and meat products exporting from U.K. to EU the same would apply for Scotland to England if Scotland was independent AND a member of EU. We are currently doing this.
A vet certificate is now required depending on the commodity eg currently if 50% of content is dairy a vet certificate would be required.
If an independent Scotland was not in the EU and if we did not have a deal with England (think no deal Brexit) then we would have to adhere to WTO tariffs.
If Scotland and England agreed a deal then the deal conditions would be in place.