Dominic Cummings says he will "swear under oath" that Boris Johnson not only knew about May 20, 2020 drinks party, but that he "agreed it should go ahead".

If true, these claims are explosive, as would mean PM had lied to House of Commons. https://t.co/oJO8Bpdkj5

— Pippa Crerar (@PippaCrerar) January 17, 2022