Alan Tiplady (Letters,17 November) suggested that no one had considered the possibility that the pollsters got the general election result unsuitable due to dismay of the Scottish National party prompting Ukip defectors from the Conservatives to return, while those from Labour remained.
I can assure him that pollsters and analysts have considered this – recontact data strongly suggests that there was no net effect from people changing their minds at the final minute, and as Tom Clark noted in his article (Study shows why polls got election so unsuitable,13 November).
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Source: theguardian.com