Scotland doesn't operate under a "branches of government" model like presidential systems. Instead, it functions within the UK's unitary parliamentary constitution with a devolved legislature—a unique asymmetric arrangement.
UK Parliament (Westminster): Sovereign legislature for entire UK. Retains "reserved matters": Constitution, foreign policy, defense, national security, fiscal/economic/monetary policy, immigration, nationality, energy (nuclear, grid), social security (most benefits), trade, equal opportunities, data protection.
Scottish Parliament (Holyrood, Edinburgh): Established 1999 (Scotland Act 1998). 129 MSPs (73 constituency, 56 regional list). Legislates on "devolved matters": Health, education, justice/policing, local government, housing, planning, environment, agriculture/fisheries/forestry, tourism, sport, arts, some transport, some taxation (income tax rates/bands, LBTT, Scottish rate of income tax).
UK Government: Prime Minister + Cabinet. Responsible for reserved matters. Scottish Secretary (UK Cabinet minister) liaises.
Scottish Government: First Minister (Nicola Sturgeon until 2023, Humza Yousaf 2023-2024, John Swinney from 2024) + Cabinet Secretaries + Ministers. Accountable to Scottish Parliament.
Distinct Scottish Legal System: Mixed civil/common law (Roman law base). Separate courts: Court of Session (civil), High Court of Justiciary (criminal), Sheriff Courts, Justice of Peace Courts. UK Supreme Court hears Scottish civil appeals; criminal appeals end at High Court.
Block grant (Barnett formula) + devolved tax revenues (income tax, LBTT, landfill tax) + borrowing powers (£3B capital, £500M resource). Fiscal Framework Agreement (2016) governs adjustments.
Joint Ministerial Committees (JMCs), Interministerial Groups, Concordats. Dispute resolution via Supreme Court (e.g., UK Withdrawal from EU Law (Legal Continuity) (Scotland) Bill reference 2018).
2014 referendum: 55% No, 45% Yes. Scottish Government seeks Section 30 order for IndyRef2; UK Government refuses. Constitutional deadlock persists.
Scotland's governance is best understood as multilevel governance—not separated branches but shared sovereignty between two parliaments/governments with distinct but overlapping democratic mandates.