Mark Henderson answered
The constraints on the powers of the British Prime Minister are as follows:
The Cabinet: The Prime Minister has the power to appoint or dismiss any member of the Cabinet. Usually the PM will award Cabinet positions to his allies, talented individuals and powerful party members. (Appointing the latter may be necessary to appease the different ideological sects of the government.)
The Party: The party's support for the PM is by no means unconditional, and members will expect some sort of return for their loyalty. Again, as with the Cabinet, the PM may find himself compromising on some aspects of legislation in order to appease his colleagues. The party can even go as far as removing a Prime Minister from office, as Prime Minister Margaret Thatcher found out to her cost in 1990.
The Electorate: The electorate places the same constraints upon the PM as do the Cabinet and Party. If the electorate does not take kindly to the PM's policies or decisions, then they can choose not to re-elect the government in the next general election.
The Media: The media plays an important role in scrutinizing and questioning decisions taken by the PM and the government. Also, the majority of the electorate obtain their political information from the media which gives journalists a significant role in shaping the electorate's opinions on the PM and the government.
The Cabinet: The Prime Minister has the power to appoint or dismiss any member of the Cabinet. Usually the PM will award Cabinet positions to his allies, talented individuals and powerful party members. (Appointing the latter may be necessary to appease the different ideological sects of the government.)
The Party: The party's support for the PM is by no means unconditional, and members will expect some sort of return for their loyalty. Again, as with the Cabinet, the PM may find himself compromising on some aspects of legislation in order to appease his colleagues. The party can even go as far as removing a Prime Minister from office, as Prime Minister Margaret Thatcher found out to her cost in 1990.
The Electorate: The electorate places the same constraints upon the PM as do the Cabinet and Party. If the electorate does not take kindly to the PM's policies or decisions, then they can choose not to re-elect the government in the next general election.
The Media: The media plays an important role in scrutinizing and questioning decisions taken by the PM and the government. Also, the majority of the electorate obtain their political information from the media which gives journalists a significant role in shaping the electorate's opinions on the PM and the government.