You don't give two hoots- and that is fine.
But here goes all the same. The Trade deals we are wanting to have with other parts of the world, be it the USA or China. or many emerging economic/industrial powers- have much much lower standards on the environment- be it pollutants, be it animal welfare or antibiotics and other drugs and chemicals re meat of cereals, or other foodstuffs. They are often still reliant on increasing the use of coal, etc. Lower workers' rights, re conditions, days off, hours worked, holidays, etc. Lower standards on discrimination, be it against women or other groups (India for instance) and so on.
In order to allow us to export to them- they will (as Trump as already done) say, well we want to export to you- and you will have to drop your standards- oh, and give us visas in exchange for our people to access the UK. It is plain for all to see- and from their pov, makes total sense.
So many jokes about chlorinated chicken - but it is much much more serious than that. The systematic use of antibiotics for instance, is much more worrying. And the residue from heavy pollutants in all sorts of food too. Never mind welfare... which some would consider as a 'luxury'.
It is quite simple, really.