Many of the powers returning to the UK will not be subject to parliamentary jurisdiction but instead be wielded by government ministers in the form of secondary legislation
Political sovereignty
Rests with the governing party, the cabinet and the prime minister
Fusion of powers
Allows the government to sit in Parliament and to control the agenda
Decision to comply with requests to 'extend Article 50'
Rested with the prime minister and cabinet, despite Parliament's approval of the Article 50 process
Popular sovereignty
Has challenged parliamentary sovereignty
Outcome of the EU referendum in 2016
Served as an instruction to Parliament to deliver on Brexit
Parliamentary sovereignty
Has been effectively devolved to newly created institutions such as the Scottish Parliament
Sewel Convention
Implies that the devolved bodies should be asked for their consent to laws passed by Parliament that are considered to be under the jurisdiction of the devolved administrations
