Original sentence: Day-to-day political power is exercised by the Parliament of the United Kingdom (of which the Sovereign is a component, together with the House of Lords and the House of Commons), and by the Prime Minister and Cabinet.In practice, however, the Sovereign does not personally exercise most of these powers; instead, he or she delegates and generally acts on the advice of the Prime Minister and Cabinet, and according to constitutional convention
Edited sentence: However, in the case of a hung parliament, the monarch could personally have a decisive role in choosing a government, but there is no precedent for this.In practice, however, the Sovereign is bound by convention and precedent, and does not personally exercise these powers.In practice, political power is exercised through the Parliament of the United Kingdom (of which the Sovereign is a component, together with the House of Lords and the House of Commons), and by the Prime Minister and Cabinet.Instead, the responsibility of government is delegated to the executive, the monarch acting on the advice of the Prime Minister and Cabinet, and according to constitutional convention.This role has been recognised since the nineteenth century; Walter Bagehot famously identified the monarchy as the "dignified part" (that is, ceremonial), rather than the "efficient part" of government in The English Constitution (1867).Thus, as the modern British monarchy is a constitutional one, the Sovereign's role is in practice limited to ceremonial and non-partisan functions