Na h-Eileanan an Iar

The winner in 2010 was Angus MacNeil (SNP). The votes cast for the four main parties were as follows:

PartyVotes
SNP6723
Labour4838
Lib Dem1097
Conservative647

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
SNP84969195
Labour37247750
Lib Dem2281757
Conservative5631036

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
SNP11006
Labour2336
Lib Dem0
Conservative838

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.) The 2010 winner in this seat was the SNP, so we should apply a smaller swing. If we do this, we get:

PartyVotes
SNP10417
Labour2925
Lib Dem0
Conservative838

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. In this seat, the SNP won in 2010. The runner-up was Labour, and this party is still the main contender if we apply uniform swing. We should therefore expect tactical voting:

PartyVotes
SNP10501
Labour3294
Lib Dem0
Conservative385

This prediction is the best we can do at the moment. This blog therefore predicts the constituency of Na h-Eileanan an Iar will be won by the SNP candidate.

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