The five leading candidates in the French election are appearing in the first TV debate of its kind.
Recent polls show Marine Le Pen of the far-right Front National getting most votes in the first round of voting.
But they also show centrist Emmanuel Macron or scandal-hit centre-right candidate Francois Fillon defeating her in a second round run off.
Voters go to the polls on 23 April. A second round will be held on 7 May if necessary.
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Previous elections have seen televised head-to-head debates between the two remaining candidates ahead of a second round of voting.
But this is the first time the leading candidates have agreed to debate with each other before the first round.Image copyright BbC