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Europhile Macron, who has previously vowed to go “tough” on the UK’s historic Brexit vote, has been roasted for seemingly swanning around Paris like he has already won the presidency. An Elabe poll for BFM TV found that half of people surveyed considered that Ms Le Pen's campaign had started well, compared with just 43 per cent for Macron.

GETTY Marine has started her campaign well and the polls reflect public opinion could be changing

Another found some 61 per cent of French voters think that Ms Le Pen is leading a successful second-round campaign, compared to 48 per cent for Mr Macron, according to a Harris Interactive poll for RMC and Atlantico published on Wednesday. Mr Macron is the current frontrunner ahead of the second round of the French election but has been accused of complacency by both rivals and allies.

Marion Le Pen in pictures Tue, May 9, 2017 Marion Maréchal-Le Pen, niece of defeated French presidential candidate Marine Le Pen and a National Front lawmaker, announced that she will not run for re-election in the June legislative elections Play slideshow AFP/Getty Images 1 of 13 Marion Marechal-Le Pen will announce that she leaves her political mandates, according to the far-right National Front

Everyone knows what side Emmanuel Macron is on - he is on the side of the corporations Marine Le Pen

He was booed and jeered by striking factory workers during a chaotic campaign visit in northern France, marking a stark contrast with Ms Le Pen taking photographs with workers. She vowed to stop the factory from closing if elected on May 7, and told the striking staff: “Everyone knows what side Emmanuel Macron is on - he is on the side of the corporations.

“I am on the workers' side, here in the car park, not in the restaurants of Amiens.” Ms Le Pen’s supporters, including her father, are trying to split the unified front against her by praising the defeated far left candidate, Jean-Luc Mélenchon.

In a Channel 4 interview, aired in February, the En Marche! chief repeatedly promised to ensure Britain faced “consequences” for voting Leave. Rivals and potential allies alike criticised Mr Macron for visiting on an expensive Parisian restaurant, the same choice as unpopular incumbent François Hollande, for celebrations after coming out on top in the first round of voting.

GETTY The far left former candidate has warned his supporters against joining Le Pen

Mr Macron won the first-round vote on Sunday with 23.9 per cent of the total vote. His rival, anti-EU Ms Le Pen, finished second after gathering 21.4 per cent of support.

GETTY Marine made moves to distance herself from her father and removed him from the party