 The iXXi Briefings (from 9/11, written in Roman numerals) are private discussions which are attended by around 40 distinguished people, chaired by Lord Desai.At the briefings, two speakers talk for 15 minutes each before discussion is opened to all attendees, operating under Chatham House Rules.iXXi briefings provide an opportunity for the LSE to exhibit its resources and engage with experts and prominent figures.