


How did pollsters do in predicting the British election?
The biggest miss since 1992
THERE WAS no shortage of predictions about how Britain’s general election would pan out on July 4th. An enormous amount of data gathered over the six weeks of the campaign—144 national polls in all, surveying a total of 622,000 people—pointed to one outcome: a large Labour landslide. That outcome duly materialised: Labour’s seat haul of 411 seats gives it a majority of 172 in the new Parliament. Even so, the polling firms did not exactly cover themselves in glory.
An average of 17 voting-intention polls conducted immediately before election day suggested that Labour would enjoy an 18-percentage-point lead over the Conservatives. But once the ballots had been counted, Labour’s share of the vote was just 10.3 points ahead of the Tories’. Underestimating the Conservative Party’s support and over-estimating Labour’s is an age-old problem for the polling industry. But this is the biggest miss since the election in 1992. Jane Green, a professor of politics at Oxford University and president of the British Polling Council, says it is “too soon to know why” the pollsters were off target. Even so, theories abound.
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How shallow was Labour’s victory in the British election?
The British party system may be fragmenting but voters delivered a coherent message

Labour’s victory is good for Britain’s union of four countries
It is not clear how long that will last

Labour’s landslide victory will turn politics on its head
But even with a majority this big, running bad-tempered Britain will not be easy
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