 The appointment of the prime minister is also , theoretically , governed by the royal prerogative . Technically the monarch may appoint as prime minister anyone she wants to appoint , but in practice the appointee is always the person who commands a majority in the House of Commons . Usually , this is the leader of the political party that is returned to Parliament with a majority of seats after a general election . Difficulties may result with a so @-@ called hung parliament , in which no party commands majority support , as last occurred in 2010 . In this situation , constitutional convention is that the previous incumbent has the first right to form a coalition government and seek appointment . If the prime minister decides to retire in the middle of a parliamentary session , as Anthony Eden did in 1957 , the monarch has no discretion . There is usually a " prime minister @-@ in @-@ waiting " who commands the support of the majority of the Commons ; he or she will near @-@ automatically be appointed . 
 The appointment of the prime minister <a href='drop_aux' title='1'><mark>is</mark></a>also , theoretically , governed by the royal prerogative . Technically the monarch may appoint as prime minister anyone she <a href='uninflect' title='2'><mark>wants</mark></a> to appoint , but in practice the appointee <a href='drop_aux' title='3'><mark>is</mark></a>always the person <a href='null_relcl' title='4'><mark>who</mark></a><a href='uninflect' title='5'><mark>commands</mark></a> a majority in the House of Commons . Usually , this <a href='drop_aux' title='6'><mark>is</mark></a>the leader of the political party <a href='null_relcl' title='7'><mark>that</mark></a>is returned to Parliament with a majority of seats after a general election . Difficulties may result with a so @-@ called hung parliament , in which no party <a href='uninflect' title='8'><mark>commands</mark></a> majority support , as last occurred in 2010 . In this situation , constitutional convention is that the previous incumbent <a href='got' title='9'><mark>has</mark></a> the first right to form a coalition government and seek appointment . If the prime minister <a href='uninflect' title='10'><mark>decides</mark></a> to retire in the middle of a parliamentary session , as Anthony Eden did in 1957 , the monarch <a href='got' title='11'><mark>has</mark></a> no discretion . <a href='dey_it' title='12'><mark>There</mark></a> is usually a " prime minister @-@ in @-@ waiting " <a href='null_relcl' title='13'><mark>who</mark></a><a href='uninflect' title='14'><mark>commands</mark></a> the support of the majority of the Commons ; he or she will near @-@ automatically be appointed . 
The appointment of da prime minister also , theoretically , governed by the royal prerogative . Technically tdamonarch may appoint as prime minister anyone she want to appoint , but in practice the appointee always the person command a majority in the House of Commons . Usually , dis the leader of the political party is returned to Parliament with a majority of seats after a general election . Difficulties may result wid a soo @-@ called hung parliament , in which no party command majority support , as last occurred in 2010 . In tdisshyt , constitutional convention is dat the previous incumbent got thdairst right to form a coalition government and seek appointment . If the prime minister decide to retire in thedaddle of a parliamentary session , as Anthony Eden did in 1957 , the monarch got no discretion . It is usually a " prime minister @-@ in @-@ waitin " command the support of the majority of the Commons ; he or she gon near @-@ automatically be appointed .