Jane Onyanga-Omara

USA TODAY

LONDON — Two new polls suggest that support has swung back toward remaining in the European Union, as campaigning resumed Sunday after last week's slaying of British lawmaker Jo Cox.

A poll conducted Friday and Saturday by market research firm Survation for the Mail on Sunday said 45% of the respondents wanted to stay in the 28-member EU, and 42% wanted to leave.

A survey by YouGov for the Sunday Times conducted Thursday and Friday said 44% wanted to remain, and 43% wanted to leave.

Britons vote Thursday on a referendum about the United Kingdom's membership in the EU. Previous polls had put Brexit — Britain’s departure from the bloc — ahead of those favoring to remain in the EU.

The latest poll by Survation is the first since Cox, 41, a Labor Party member of Parliament, was shot and stabbed in the street Thursday after she met with constituents in the village of Birstall in West Yorkshire in northern England. The suspect, Thomas Mair, 52, was charged with her death and appeared in court Saturday.

A third of the responses to the YouGov poll were gathered before the death of Cox, who supported remaining in the EU.

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YouGov said it does not think the strengthened support to remain in the EU is connected to her murder. “The underlying figures suggest the movement may be more to do with people worrying about the economic impact of leaving the European Union,” said YouGov spokesman Anthony Wells.

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Prime Minister David Cameron, who is campaigning to remain with the EU, said he would continue as prime minister even if the nation votes for Brexit, the Sunday Times reported. Many have speculated that Cameron could go if the campaign to leave is successful.

Investors expect the pound to fall sharply if Britain votes to exit the EU, and the Economist Intelligence Unit predicted the economy would shrink 1% next year if the country votes for Brexit.

Cameron told the Sunday Times that leaving the EU would be “a one-way ticket.”

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“Once you have jumped out of the aeroplane, you can’t scramble back through the door,” he said. “There is no way back in. This is an irreversible decision with very bad consequences for the British economy.”

Justice Secretary Michael Gove, a member of the ruling Conservative Party who is campaigning to leave the bloc, told the Sunday Telegraph: “There are economic risks if we leave, economic risks if we remain. I don’t think there will be a recession as a result of a vote to leave.

“But at some point in the future, it may be the case that global economic factors cause problems. My argument is that whatever happens in the future, an independent Britain will be better able to cope with those strains.”