What they will do with the new tractor rules? The same as happens with all EU regulations:

The British will set up a new department to deal with this (good for jobs). The new department will set about this task with great gusto showing everyone how efficient they are. The department will enforce the dictat 2 years before it needs enforcing, putting more farmers and contractors out of business and not caring whether they make Britain less competitive than the rest of Europe.

The Germans will make an effort to bring in the new regulations.

The French will read them

The Italians will ignore them

.... And the UK will then import food from the countries that do not have these regulations that have caused the prices to rise too much