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politicalbetting.com » Blog Archive » Author & ex-political journalist, Robert Harris, suggests TMay might be making Heath’s 1974 mistake

May reminiscent of Heath in 74. Called an opportunistic election when far ahead in polls & then campaign unravelled under scrutiny

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another_richard

A quick look at the polls shows that Heath wasn't ahead in them when he called the election - although he did get a boost after so doing:

http://ukpollingreport.co.uk/vote-intention-1970-oct1974

The better comparison is with 1966.