I presume this is a fearmongering reference to washed chickens.
chlorine
A Trade agreement is one thing,sorting out the nitty gritty detail is another.
and surely the function of an opposition party is to highlight any such concerns and to fight for whatever may be deemed the best solution.
As the article explains there are very good reasons for the chlorine wash. The EU taking it as an excuse for unproven detrimental practices and poor husbandry is simply hysterical protectionism at its worst.