Queen sacks PM: You Heard it Here First

"...not everyone is aware that there is a precedent for the Crown to sack a sitting Prime Minister..."

Whenever the prospect of a hung parliament comes to mind (and given the many column inches and acres of cyberspace that must be filled in the run-up to an election, it always does), the question of the Queen’s constitutional role is never far behind. If there is no outright winner, must she summon the leader of the single largest party? Or (if it is not one and the same person) must she allow the sitting Prime Minister the opportunity to seek to form a government (of all the persuadable talents)?