British Prime Minister Boris Johnson (L) leaves 10 Downing Street for Prime Minister's Questions at the House of Commons in London, Britain on July 22, 2020. (Photo by Ray Tang/Xinhua)

British Prime Minister Boris Johnson (L) leaves 10 Downing Street for Prime Minister's Questions at the House of Commons in London, Britain on July 22, 2020. (Photo by Ray Tang/Xinhua)

British Prime Minister Boris Johnson (L) leaves 10 Downing Street for Prime Minister's Questions at the House of Commons in London, Britain on July 22, 2020. (Photo by Ray Tang/Xinhua)