The current forecast is that our GDP will shrink by 3.5%, and EU countrys’ bt 1.5%.
Thing is, they can trade with each other, being near neighbours, and they have trade deals in place with other non EU countries. We have no one at present.
Trump said he’d sign a deal, but this would include their disgusting foodstuffs, and probably an in to our NHS; Jeremy Hunt has already had meetings with American insurance companies, and Mrs May has refused to rule out American involvement in our health service.
India and Turkey are willing to talk, but any deal would include free movement of their citizens, and could take years to sort out.
As least the horsemeat was safe horsemeat, which caused zero health problems; some people refuse to eat pretty animals for some reason.