Your Politics Guide

What are electoral systems?

Image representing electoral systems
  • Electoral systems are the methods used to translate votes into seats.
  • They determine how votes cast by the public are counted and how the results decide who wins elections.
  • Minority government: A government where the ruling party does not have more than half the seats in the legislature. They will usually rely on support from other parties to pass laws.
  • Coalition government: A government formed by two or more political parties who agree to work together, this usually happens when no single party has a majority.
  • Safe seat: A constituency that is very likely to be won by the same party at each election.
  • Marginal seat: A constituency that could be won by different parties, often with a small majority. These seats can be referred to as swing seats.

Types of Electoral Systems

FPTP
First Past the Post (FPTP)
The UK's main electoral system for general elections.
AMS
Additional Member System (AMS)
The hybrid electoral system
STV
Single Transferable Vote (STV)
A proportional voting system
SV
Supplementary Vote (SV)
The electoral system that was used for London mayoral elections.

Helpful Resources

YouTube
Watch: FPTP explained
CGP Grey has several videos about voting systems which are easy to understand.
Guide
Read: Types of Voting Systems
A more detailed written guide to all the systems you need to know.
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