Actually, the Queen was historically rather more involved than this in the era of Hume, Macmillan and Eden; and previous monarchs before her even more so. I ag

Actually, the Queen was historically rather more involved than this in the era of Hume, Macmillan and Eden; and previous monarchs before her even more so. I agree that in the current era though, she would only send for an alternate PM if they had demonstrated confidence of the House of Commons, which is very unlikely.