Francois Hollande, right, with Manuel Valls at the Elysee Palace in Paris earlier todayGetty Images

President Hollande’s enfeebled government caved in to France’s trade unions today, allowing a fresh protest to go ahead in Paris tomorrow hours after banning the march.

The chaotic U-turn underlined the socialist leader’s shaky authority and also fuelled speculation that the reformist prime minister, Manuel Valls, might quit.

The decision came after a revolt by Mr Hollande’s own left-wing MPs and succeeded in strengthening the hand of unions, which have been striking for months against a reform to the labour laws.

Philippe Martinez, leader of the hard-left CGT union, proclaimed a triumph and demanded once again that Mr Hollande suspend…