Voter power in Lewisham West & Penge


Constituency marginality

Fairly safe

In Lewisham West & Penge, one person does not really have one vote, they have the equivalent of 0.313 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 Lewisham West & Penge compare?

Voters in Lewisham West & Penge have 1.03x 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.

Lewisham West & Penge ranks #254 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).

Further information


The more times a seat changes hands, the more marginal it is deemed to be.

  • 2010 Lab

Constituency size


This constituency is about average size.

Number of voters: 69,534

Average constituency: 69,718

2010 election data

59% of votes discarded

58.90% of those who voted in Lewisham West & Penge 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

2010 General Election result in Lewisham West & Penge

Winner takes all

2010 General Election result in Lewisham West & Penge

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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
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