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The 2011 Holyrood election: When Scottish Labour moved from a 14pc YouGov lead to being 18pc behind in just 11 weeks

December 15th, 2013

How polling leads can just evaporate

The chart shows the sequence of YouGov Holyrood regional vote shares for LAB and SNP in the eleven weeks running up to the May 2011 elections.

The movement is startling and even YouGov’s eve of poll survey, with an SNP lead of just 7% was a long way out. The actual SNP lead was 18%.

    This is a timely reminder for both GE2015 polling and, of course, the Scottish IndyRef, just nine months away.

We should never forget that polling can have its limitations.

Mike Smithson

Blogging from OUTSIDE the Westminster bubble since 2004