I'm talking about his office, rather. My understanding of it is, once again, that the Speaker of the House of Commons is fully entitled to welcome a certain number of guests to special events, like President Zelenskyy's speech.
Once again, while I have no direct knowledge of the matter, I would have naturally assumed that the security services that protect us carried out some security checks. Their role is to determine whether certain men or women constitute a threat to the building or the people in it.