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  • October 1974

    ITN: Wrong by 12

    BBC: Wrong by 132

    1979

    ITN: Wrong by 20

    BBC: Wrong by 29

    1983

    ITN: Wrong by 28

    BBC: Wrong by 2

    1987

    ITN: Wrong by 34

    BBC: Wrong by 76

    1992

    ITN: Wrong by 62

    BBC: Wrong by 70

    1997

    ITN: Wrong by 20

    BBC: Wrong by 6

    But in the last decade and a half the exit polls have become much more accurate.

    Here are the figures for 2001.

    ITN: Wrong by 8

    BBC: Wrong by 10

    From 2005 onwards there has been a joint exit poll, firstly commissioned for ITN and the BBC, and then, from 2010 onwards, for Sky too. Its record has been much better.

    2005

    Wrong by 0. It predicted a Labour majority of 66, which Labour got.

    2010

    Wrong by 0. It said the Tories would be 19 short of a majority, and they were.

    2015

    Wrong by 22. It said the Tories would be 10 seats short of a majority, but they got a majority of 12.

  • That's impressive accuracy. I'm a bit ashamed I didn't know just how good they are (or were, but let's hope are).

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