@Florianus
For the terminally hard of understanding, I will point out yet again that the person who runs the civil service at No.10 is called the Chief of Staff. The clue is in the name: Chief of Staff.
For the terminally hard of understanding (you apparently): This is not true.
I do not support Johnson, but I am keen to see the person who ran these parties - the one who ordered the cheese board and sent out the invitations, punished. I really do not see why a number of people here are so deluded that they think it would be a good thing to blame and punish the wrong person.
As far as I know the only 'invitations' we've seen were sent by Martin Reynolds, the Prime Minister's Personal Private Secretary, rather than the Chief of Staff Dan Rosenfield.
According to Wikipedia "The Downing Street chief of staff is the most senior political appointee in the Office of the Prime Minister of the United Kingdom, acting as a senior aide to the prime minister, a powerful, non-ministerial position within Her Majesty's Government." So that's Dan Rosenfield - a political appointee of the PM, who (as far as I know) didn't send any invitations, although he's apparently alleged to have attended some of the (allegedly) illegal parties.
The person who sent the invitations we know about was Martyn Reynolds, the PM's Principal Private Secretary, who used the term 'we' in sending the invitations. That 'we' could presumably have been him and Larry the cat, him and the cleaning staff, or him (as the person who runs the Prime Minister's Office) and the Prime Minister.