Unseasonal warm weather heralded in January 2016 but was quickly followed by an icy wind that swept away some of our better known chefs and restauranteurs. One by one top names announced closures, Claude Bosi, Hix, Richard Caring, Allegra McEvedy and others all put up For Sale signs. Even the high priest of politically correct eating Ottolenghi has been forced to shutter his Covent Garden eaterie...