France's far-right Rassemblement National (RN) party jumped ahead of President Emmanuel Macron's LREM for the first time in a poll of voting intentions for May 2019 European Parliament elections.

An Ifop poll published on Sunday showed the centrist Republic on the Move (LREM) with 19 percent of voting intentions compared to 20 percent at the end of August, while far-right leader Marine Le Pen's RN -- formerly the National Front -- rose to 21 percent from 17 percent previously.

Together with the seven percent score of sovereignist Nicolas Dupont-Aignan and one percent each for "Frexit" parties led by former Le Pen associate Florian Philippot and Francois Asselineau, far-right parties won a combined 30 percent of voting intentions, up from 25 percent end August.

The poll asked nearly 1,000 French people on Oct 30-31 who they would vote for if the European Parliament elections were to be held the next Sunday.

The conservative Les Republicains party led by Laurent Wauquiez slipped two percentage points to 13 percent, while the far-left France Insoumise led by Jean-Luc Melenchon fell from 14 to 11 percent.