“We are dancing in the dark as we just don’t know what’s going to happen,” said Boohoo’s chairman Peter Williams. The stark findings, echoed by the likes of retail veteran Richard Pennycook, chairman of Fenwick and the Hut, as well as Tesco’s John Allan and David Tyler of Sainsbury’s, come a week after the boss of Next, Lord (Simon) Wolfson, warned of the risks of ports grinding to a halt if Britain crashed out of the EU with no deal. “The tumult matters because retail isn’t a sideshow. Its success is central to the vitality of the economy,” said Korn Ferry’s Sarah Lim.