France, June 25 -- France's Socialists have filed a no-confidence measure against Prime Minister Francois Bayrou after pension talks collapsed, a senior party lawmaker said on Tuesday, but it has little chance of passing without the support of the far-right National Rally which for the moment has suggested it will not follow suit.

Months-long talks between French trade unions and employers over reforms to the pension system crumbled late on Monday, prompting Bayrou to summon both sides for talks to find a way forward.

In parliament on Tuesday, Bayrou said he was still convinced that there was "a path, albeit a very difficult one, that can lead us out of this impasse".

But in what were billed as last-chance talks, pension negotiators fa...