Edinburgh South West

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

PartyVotes
SNP5530
Labour19473
Lib Dem8194
Conservative11026

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
SNP3082424659
Labour2444019884
Lib Dem157618367
Conservative1925411259

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
SNP18759
Labour11744
Lib Dem1420
Conservative11617

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
SNP20578
Labour9926
Lib Dem1420
Conservative11617

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
SNP21896
Labour15747
Lib Dem554
Conservative5344

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

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