How Scotland elects its Parliament
Scottish Parliament elections use the Additional Member System (AMS), combining constituency contests with regional representation. Voters receive two ballot papers: one for a constituency candidate and one for a political party or independent candidate in their region.
The constituency side elects 73 MSPs. A further 56 regional MSPs are allocated across eight electoral regions, seven in each, to make the overall result more proportional than the constituency results alone.
Holyrood is not Westminster
A Scottish Parliament election chooses MSPs to make decisions on devolved matters. A UK general election chooses MPs to sit in the House of Commons. Scotland therefore uses AMS for Holyrood but First Past the Post for Westminster.
The two-vote system also means Scottish election results contain two distinct sets of vote shares: constituency votes and regional-list votes. They should not be treated as interchangeable.