Chris Patten, the last British governor of Hong Kong and a former EU commissioner for external affairs, is chancellor of the University of Oxford and author of The Hong Kong Diaries

We know that people who are infected with the virus that causes Covid-19 may suffer from symptoms that last for weeks or months after the infection has passed. Similarly, the fall of disgraced British Prime Minister Boris Johnson and the election of his successor by the Conservative Party will likely have serious lingering effects. Call it 'Long Boris'.