The top minister advises the sovereign at the exercising of a good deal of the royal prerogative, chairs the Cabinet and selects its ministers. As contemporary-day top ministers preserve workplace via way of means of distinctive feature in their cappotential to command the self assurance of the House of Commons, they take a seat down as contributors of Parliament. The workplace of high minister isn't set up via way of means of any statute or constitutional document, however exists most effective via way of means of long-set up convention, wherein the reigning monarch appoints as high minister the character maximum probable to command the self belief of the House of Commons;[3] this character is usually the chief of the political birthday birthday celebration or coalition of events that holds the biggest quantity of seats in that chamber. 
 
The high minister is ex officio additionally First Lord of the Treasury, Minister for the Civil Service and the minister liable for country wide security.[4]: p.22  Indeed, sure privileges, along with residency of 10 Downing Street, are accorded to high ministers via way of means of distinctive feature in their role as First Lord of the Treasury. In 2019, the workplace of Minister for the Union became set up; Boris Johnson have become the primary high minister to preserve this title.
 
Rishi Sunak is the incumbent Prime Minister, succeeding Liz Truss on 25 October 2022.The role of high minister become now no longer created; it developed slowly and organically over 3 hundred years because of severa Acts of Parliament, political developments, and injuries of history. The workplace is consequently fine understood from a ancient perspective. The origins of the placement are discovered in constitutional adjustments that happened all through the Revolutionary Settlement (1688–1720) and the ensuing shift of political electricity from the sovereign to Parliament.[7] Although the sovereign become now no longer stripped in their historical prerogative powers and legally remained the pinnacle of presidency, politically it progressively have become vital for her or him to manipulate via a high minister who may want to command a majority in Parliament. 
 
By the 1830s, the Westminster gadget of presidency (or cupboard government) had emerged; the high minister had grow to be primus inter pares or the primary amongst equals withinside the Cabinet and the pinnacle of presidency withinside the United Kingdom. The political role of high minister become improved through the improvement of current political parties, the creation of mass communique and photography. By the begin of the twentieth century the current premiership had emerged; the workplace had grow to be the pre-eminent role withinside the constitutional hierarchy on the subject of the sovereign, Parliament and Cabinet.