Yanis Varoufakis, the former finance minister of Greece, said Theresa May has "no chance" of negotiating a successful Brexit deal for the UK and would need at least five years to conclude any divorce settlement for Britain.
Varoufakis, who led negotiations with creditors during the 2015 Greek government-debt crisis, told Financial News: "There is no way Brussels will allow a deal that leaves Britain in a better place."
