Suella Braverman’s former chief of staff felt “exhausted” and “harassed” by an activist known as Stop Brexit Man, who regularly plays music outside Parliament, a court has heard.

Giorgi Gabitashvili along with three other high-ranking officials have been made subject to asset freezes and travel bans.

Anton Dani, a Conservative politician who was once a mayor of Boston, says that some are deterred by online abuse. “I’m the only one who sneaked in,” says Mr Dani, a Morocco-born Briton.

The art of culinary diplomacy, practiced by presidents at White House state dinners for more than 150 years, is the theme of ...