Let me say first that this was a large Zoom group, and the editor and author are both alumni of Selwyn, one of the colleges of the University of Cambridge, as I am. I did manage to ask one question. Since it was a private group I shall not name the figures, though you may be able to guess who they are, particularly the editor.
The editor founded one of the largest independent publishers in the world in the eighties, and has published Booker Prize winners and Nobel Prize winners. He also discovered JK Rowling–to whom he offered the princely advance of £1,500 for her first novel. (Her agent persuaded him to raise the offer to £2,500!) Many people in the meeting asked questions about how to find a publisher, whether an agent was necessary, and so on.