 The royal prerogative is in much use in the realm of foreign affairs . It is the monarch who recognises foreign states ( although several statutes regulate the immunities enjoyed by their heads and diplomatic representatives ) , issues declarations of war and peace , and forms international treaties . The monarch also has the power to annex territory , as was done in 1955 with the island of Rockall . Once territory has been annexed , the monarch has complete discretion as to the extent to which the government will take over the former government 's liabilities ; this was confirmed in West Rand Central Gold Mining Company v The King . The monarch also has the power to alter British territorial waters and cede territory . Her freedom to do these things in practice is doubtful , in that they might deprive British citizens of their nationality and rights . When the island of Heligoland was ceded to Germany in 1890 , Parliamentary approval was first sought . The monarch can also regulate colonies and dependent territories by exercising the prerogative through Orders in Council . The courts have long fought against the monarch 's use of this power : in R ( Bancoult ) v Secretary of State for Foreign and Commonwealth Affairs ( No 2 ) , the Court of Appeal ruled that using Orders @-@ in @-@ Council to frustrate judicial rulings was an unlawful abuse of power , although this ruling was later overturned . 
 The royal prerogative is in much use in the realm of foreign affairs . It <a href='drop_aux' title='1'><mark>is</mark></a>the monarch <a href='null_relcl' title='2'><mark>who</mark></a><a href='uninflect' title='3'><mark>recognises</mark></a> foreign states ( although several statutes regulate the immunities enjoyed by their heads and diplomatic representatives ) , issues declarations of war and peace , and <a href='uninflect' title='4'><mark>forms</mark></a> international treaties . The monarch also <a href='got' title='5'><mark>has</mark></a> the power to annex territory , as was done in 1955 with the island of Rockall . Once territory <a href='been_done' title='6'><mark>has</mark></a> been annexed , the monarch <a href='got' title='7'><mark>has</mark></a> complete discretion as to the extent to which the government will take over the former government <a href='null_genetive' title='8'><mark>'s</mark></a>liabilities ; this was confirmed in West Rand Central Gold Mining Company v The King . The monarch also <a href='got' title='9'><mark>has</mark></a> the power to alter British territorial waters and cede territory . Her freedom to do these things in practice <a href='drop_aux' title='10'><mark>is</mark></a>doubtful , in that they might deprive British citizens of their nationality and rights . When the island of Heligoland was ceded to Germany in 1890 , Parliamentary approval was first sought . The monarch can also regulate colonies and dependent territories by exercising the prerogative through Orders in Council . The courts <a href='been_done' title='11'><mark>have</mark></a> long fought against the monarch <a href='null_genetive' title='12'><mark>'s</mark></a>use of this power : in R ( Bancoult ) v Secretary of State for Foreign and Commonwealth Affairs ( No 2 ) , the Court of Appeal ruled that using Orders @-@ in @-@ Council to frustrate judicial rulings was an unlawful abuse of power , although this ruling was later overturned . 
The royal prerogative is in much use in the realm of foreign affairs . It da monarch recognise foreign states ( although several statutes regulate the immunities enjoyed by their heads and diplomatic representatives ) , issues declarations of war and peace , and form international treaties . The monarch also got the power to annex territory , as was done in 1955 with the island of Rockall . Once territory done been annexed , the monarch got complete discretion as to the extent to which the government gon take ova the former government  liabilities ; this was confirmed in West Rand Central Gold Mining Company v TdaKing . The monarch also got the power to alter British territorial waters and cede territory . Her freedom to do these things in practice doubtful , in dat they mite deprive British citizens of their nationality and rights . When the island of Heligoland was ceded to Germany in 1890 , Parliamentary approval was first sought . The monarch can also regulate colonies and dependent territories by exercising the prerogative through Orders in Council . The courts done long fought against the monarch  use of this power : in R ( Bancoult ) v Secretary of State for Foreign and Commonwealth Affairs ( No 2 ) , thdaourt of Appeal ruled that using Orders @-@ in @-@ Council to frustrate judicial rulings was an unlawful abuse of power , although dis ruling was later overturned .