France, Jan. 29 -- Galvanised by the success of their first downing of tools against pension reforms earlier this month, trade unions are calling for new demonstrations across France from Tuesday and threatening more industrial action into February.

After their tour de force on 19 January- more than two million took to the streets according to the organisers- France's eight main trade unions have called for "a more massive mobilisation on 31 January".

However, Prime Minister Elisabeth Borne has stood firm, saying the raising of the retirement age to 64 in France is "no longer negotiable".

Unions are hoping for massive popular wave against the proposals of the "unfair reform" and its key measure: the postponement of the legal retirement...