Voter power index for Portsmouth South
Rank #245 of 650
Voter power in Portsmouth South
In Portsmouth South, one person does not really have one vote, they have the equivalent of 0.326 votes.
The power of voters in this constituency is based on the probability of the seat changing hands and its size.
While you might think that every vote counts equally, where you live in the UK has a huge effect on your power to influence the election.
How does Portsmouth South compare?
Voters in Portsmouth South have 1.07x more voting power than the UK average.
Average UK voter power
The average UK voter only has the power of 0.305 votes. This is because most of us live in safe seats, where the outcome is pretty much certain regardless of how we vote.
Portsmouth South ranks #245 out of 650 constituencies in the Voter Power Index.
UK constituency marginality
We can be almost certain that 60% of seats will NOT change hands in the general election (very safe or ultra safe seats).
The more times a seat changes hands, the more marginal it is deemed to be.
- 1997 LibDem
- 2001 LibDem
- 2005 LibDem
- 2010 LibDem
This constituency is about average size.
Number of voters: 68,792
Average constituency: 69,718
2010 election data
54% of votes discarded
54.10% of those who voted in Portsmouth South in 2010 did not vote for the winning candidate. These votes count for nothing in the First Past the Post system.
2010 General Election result
Winner takes all
Show your support
The Voter Power Index is based on research by NEF (the New Economics Foundation)
If the UK had a proportional voting system:
- We would no longer have safe seats
- The power of votes would be much more equal
- All areas of the UK would have equal power to decide the outcome of the election
- Politicians would not be able to win an election by tailoring all their policies to a narrow section of the population