Former negotiator believes in an unstable world, it is ‘perfectly possible’ the UK can rejoin the EU with old opt-outs UK could keep special pre-Brexit terms if it rejoined EU, Michel Barnier says A couple of years ago, Michel Barnier spent a weekend with Boris Johnson’s father, Stanley. It was not some ghoulish Brexit spin-off of The Traitors, but the result of the former EU negotiator’s wife, Isabelle, being a close friend of Johnson’s French cousin, Anne du Boucheron, the owner of Château de la Baronnière, a 19th-century estate in Mauges-sur-Loire, in western France. “We spent a weekend together in a French castle. Very friendly. Long promenades in the forest,” Barnier recalls of Johnson senior, with whom he discussed the former prime minister’s motivation to back Brexit. “It was intere