Event no 1 was 18 June 2020: The Telegraph understands official in question is Hannah Young, who left No10 to take up the role of deputy consul general in NY
About 20 people attended. Alcohol, including wine, was drunk. One government source claimed the event was “raucous”
Event number 2 was on Dec 17 2020: official who was leaving is Captain Steve Higham, then one of Mr Johnson's military advisers
Capt Higham became Commanding Officer of the HMS Prince of Wales in July 2021.
PM said to have attended
Event number 3 was on 14 Jan 2021: a senior civil servant in the culture department, who took up the role after leaving Downing Street, was one of the two officials given a send-off. The other’s identity is not known
PM said to have attended