Midlothian

The winner in 2010 was David Hamilton (Labour). The votes cast for the four main parties were as follows:

PartyVotes
SNP8100
Labour18449
Lib Dem6711
Conservative4661

The 2011 Holyrood election was conducted using different constituencies, but we can calculate the equivalent Westminster result. We can do something similar for the independence referendum result, mapping the Yes votes to SNP votes and the No votes to Labour, LD and Conservative votes according to their distribution at the last UK election. If we do this, the results were as follows:

Party20112014
SNP1265726370
Labour836321017
Lib Dem33297645
Conservative26405310

The latest opinion poll by YouGov (8th-9th April) gave Labour 25%, the SNP 49%, the Tories 18% and the Lib Dems 4%. If we apply the swing implied by these figures to the 2010 results for this constituency, we get:

PartyVotes
SNP19519
Labour11778
Lib Dem864
Conservative5171

Lord Ashcroft conducted some constituency polls earlier this year which seemed to show that the swing to the SNP was 4% greater in Labour-held seats (and as a consequence smaller in seats held by the Tories and the Lib Dems.) This seat was won by Labour in 2010, so we should apply an even greater swing. If we do this, we get:

PartyVotes
SNP21089
Labour10208
Lib Dem864
Conservative5171

Finally, another opinion poll has shown that voters will to some extent vote tactically in seats where there is a clear opponent to the SNP. This seat was won by Labour in 2010, and this party is still the SNP's main opponent if we apply uniform swing. We should therefore expect tactical voting:

PartyVotes
SNP21701
Labour12915
Lib Dem337
Conservative2379

This prediction is the best we can do at the moment. This blog therefore predicts the constituency of Midlothian will be won by the SNP candidate.

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