The figures come from the pollster’s latest Brexit tracker survey of 2,037 British adults. They exclude those who said they would not vote or did not know.
With the latter factored in, the number of UK respondents who said they would vote to rejoin was down to 46% in the May poll, compared to 47% recorded in the previous month. Thirty-three percent said they would vote to leave or stay out, while 9% each said they would not vote or did not know.
The poll, conducted in the UK and across the EU from May 10-23, also showed that support of EU membership remained strong in France, Germany, Denmark, Sweden, Spain and Italy. In Italy and France, two of the most EU-skeptical countries, 50% and 47% respectively said they would vote to stay if a Brexit-style referendum was held.