Brits got a cough after brexit
Not much of one, however we have more deep water ports than the rest of Europe combined, have London which if it was a separate country would be richer than most in Europe and have the northern industrial base as well. That and a culture wehre panicking and over-analysis are rare.
Poland is of course stuck right next to Germany who see the EU as the next stage of their mercantile ambitions. That and the EU agricultural policy; existing to satisfy 'farmers' in southern France and Italy with just a few hectares and a mixed output combined with an intense lobbying from the factory farms that exist to provide what people actually eat.
In a transnational organisation like the EU there will always be winners and losers. The losers will not be in France, Germany, Northern Italy or the Netherlands.
I should have written neo-Marxists
You could've, however it would've been equally meaningless.