
Thomas Caygill, Nottingham Trent University
In a surprise move, Rishi Sunak, the UK’s prime minister, has appointed former prime minister David Cameron as foreign secretary. Cameron, who resigned immediately after losing the 2016 Brexit referendum, has been almost entirely absent from the political scene ever since.
It’s rare these days for a prime minister to appoint someone who is not a sitting member of the House of Commons as a cabinet level minister in their government but Sunak certainly can do it. The prime minister has what we call the power of patronage.
What we mean by this is that there are a number of public roles for which the prime minister gets to decide who gets the job. Those powers of patronage include appointing members of the cabinet as well as other junior ministers to serve in government.
It is only a constitutional convention, rather than a rule, that government ministers be a member of either house of parliament. However, it is a convention that has been strongly abided by.
This convention revolves around the constitutional principle of responsible...