By Richard Wood
The Scottish Parliament’s Additional Member System is significantly more representative than Westminster’s First Past the Post electoral system. But AMS has significant flaws that need to be addressed.
Recent polls suggest that the SNP could win close to a majority of seats – or possibly a majority – on far less than a majority of votes.
READ MORE: New Scottish poll shows why it’s time to ditch Holyrood’s voting system
This is largely down to the imbalance of constituency seats to list seats alongside one party, in this case the SNP, doing significantly better than other parties across Scottish constituencies.
Since the advent of devolution in 1999, there have been 73 constituency seats to 56 list seats. This means that one party could theoretically win a majority of seats on constituency seats only.
Such aan outcome is possible in 7 May 2026, according to recent polling.
Modifying the Additional Member System
One way to address this would be to reform AMS (although it’s worth noting the system has wider flaws that would still persist).
This could involve the introduction of levelling seats if seats don’t match votes. Or else adding two MSPs to each region, creating a more 50-50 sit of constituency and list MSPs.
Alternatively, the number of constituency seats could be cut and replaced by list MSPs. This is an option if decision-makers are wedded to 129 MSPs.
READ MORE: Will the Scottish Parliament change its voting system?
STV or other alternatives
Alternatively, it is worth considering other voting systems. Introducing the Single Transferable Vote, if designed well, could improve proportionality while also empowering voters and giving them the option to vote across different parties.
A more radical alternative would be to introduce an Open List system Proportional Representation with levelling seats to maximise proportionality.
READ MORE: Northern Ireland Assembly election – the benefits of Proportional Representation
The seventh Scottish Parliament must fix the voting system
So far, Holyrood election results have been broadly proportional. But the 2026 election risks exposes a major problem with the Additional Member System, namely the First Past the Post element.
READ MORE: Dual mandates ban by 2026 backed by the Scottish Government
Upgrade Holyrood 