Accuracy of exit poll predictions in recent elections

Conservative

Labour

Lib Dem

SNP

Lighter bars show

exit poll-predictions

Darker bars show

actual seats won

0

100

200

300

2005

11 seats difference

0

-9

2010

0

-3

2

2015

-15

7

2

2

2017

-4

4

2

-1

2019

3

-12

2

-7

Lighter bars show

exit poll-predicted seats

Darker bars show

actual seats won

Conservative

Labour

Lib Dem

SNP

300

200

100

0

2005

2010

2015

2017

2019

Difference between exit polls and actual seats

11

7

4

3

2

2

2

2

2

0

0

-3

-1

-4

-7

-9

-12

-15