The changes shown are from Survation’s poll just before the May 2 local elections.
Interestingly most of the change appears to have been direct CON>UKIP switch.
Survation came under some strong criticism last year for prompting for Ukip in the same way that they prompt for the other main parties. The way things have developed since then suggests that they were right.
Labour and the Lib Dems will be relatively comfortable with these numbers because the blue team is taking the biggest hit.
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