John Downing: Will Bulgaria’s new prime minister Rumen Radev step in to Viktor Orban’s ‘awkward squad’ role?

You are already forgiven if you do not know who Rumen Radev is. But in Brussels, and other EU capitals, there is a sinking feeling that we may all soon know more than we would like about the man who led a coalition of left-wing nationalists and populists to a huge election win in Bulgaria last week.