A former senior adviser to Britain's Boris Johnson said on Monday he was willing to "swear under oath" that the prime minister knew a party was being held at his residence during a COVID-19 lockdown, accusing him of lying to parliament.
LONDON (Reuters) - A former senior adviser to Britain's Boris Johnson said on Monday he was willing to "swear under oath" that the prime minister knew a party was being held at his residence during a COVID-19 lockdown, accusing him of lying to parliament.