Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. The banner reads "Let's resist together for jobs at the SBFM". Picture taken May 27, 2020. REUTERS/Stephane?Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. Picture taken May 27, 2020. REUTERS/Stephane?Mahe

Workers on strike and CGT labour union representatives of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, gather in front of the Sub-Prefecture in Lorient, France, May 29, 2020. REUTERS/Stephane?Mahe

Pierre Le Menahes, retired Renault worker and CGT labour union representative at the metal foundry, poses in front of the Fonderie de Bretagne, a subsidiary of Groupe Renault, in Caudan, France, May 27, 2020. Picture taken May 27, 2020. REUTERS/Stephane?Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. Picture taken May 27, 2020. REUTERS/Stephane?Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. The banner reads "Let's resist together for jobs at the SBFM". REUTERS/Stephane Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. REUTERS/Stephane Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. The banner reads "Let's resist together for jobs at the SBFM". REUTERS/Stephane Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. REUTERS/Stephane Mahe

Employees on strike of the Fonderie de Bretagne plant, a subsidiary of Groupe Renault, hold CGT labour union flags during a demonstration against the possible closure of their plant in Caudan, France, May 27, 2020. REUTERS/Stephane Mahe

A woman of General Confederation of Labour (CGT) attends a protest demanding equality on International Women's Day in Paris, France, March 8, 2020. REUTERS/Pascal Rossignol

Women of General Confederation of Labour (CGT) attend a protest demanding equality on International Women's Day in Paris, France, March 8, 2020. REUTERS/Pascal Rossignol

Women of General Confederation of Labour (CGT) attend a protest demanding equality on International Women's Day in Paris, France, March 8, 2020. REUTERS/Pascal Rossignol

A woman of General Confederation of Labour (CGT) gestures during a protest demanding equality on International Women's Day in Paris, France, March 8, 2020. REUTERS/Pascal Rossignol

French CGT labour union leader Philippe Martinez attends a demonstration against the government's pensions reform bill during a nationwide strike in Paris, France February 20, 2020. REUTERS/Pascal Rossignol

French CGT labour union leader Philippe Martinez attends a demonstration against the government's pensions reform bill during a nationwide strike in Paris, France February 20, 2020. REUTERS/Pascal Rossignol

French CGT labour union leader Philippe Martinez attends a demonstration against the government's pensions reform bill during a nationwide strike in Paris, France February 20, 2020. REUTERS/Pascal Rossignol

French CGT labour union confederal secretary Catherine Perret talks to journalists after the opening of a conference on pensions funding between representatives of the French state and social partners at the CESE in Paris, France, January 30, 2020. REUTERS/Charles Platiau/Pool

French CGT labour union confederal secretaries Catherine Perret and Fabrice Angei talk to journalists after the opening of a conference on pensions funding between representatives of the French state and social partners at the CESE in Paris, France, January 30, 2020. REUTERS/Charles Platiau/Pool

A French CGT labour union worker on strike attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann TPX IMAGES OF THE DAY

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Christian Hartmann

A demonstrator holds a CGT union flag during a demonstration against French government's pensions reform plans in Nice, as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Eric Gaillard

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez, Gabriel Gaudy, General Secretary of URIF FO labour union, and and Yves Veyrier, Force Ouvriere (FO) labour union General Secretary, attend a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez and Gabriel Gaudy, General Secretary of URIF FO labour union, attend a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez and Yves Veyrier, Force Ouvriere (FO) labour union General Secretary, attend a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez and Yves Veyrier, Force Ouvriere (FO) labour union General Secretary, attend a demonstration against French government's pensions reform plans in Paris as part of another day of nationwide strikes and protests in France, January 24, 2020. REUTERS/Francois Lenoir

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as France faces its 43rd consecutive day of strikes January 16, 2020. REUTERS/Benoit Tessier

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as France faces its 43rd consecutive day of strikes January 16, 2020. REUTERS/Benoit Tessier

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as France faces its 43rd consecutive day of strikes January 16, 2020. REUTERS/Benoit Tessier

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as France faces its 43rd consecutive day of strikes January 16, 2020. REUTERS/Benoit Tessier

French CGT labour union leader Philippe Martinez attends a demonstration against French government's pensions reform plans in Paris as France faces its 43rd consecutive day of strikes January 16, 2020. REUTERS/Benoit Tessier

Ferry passengers stand in front of a boarding gate at the port of Marseille, blocked by French CGT dock workers on strike during the 42nd consecutive day of strikes against French government's pensions reform plans in France, January 15, 2020. REUTERS/Jean-Paul Pelissier

French CGT labour union leader Philippe Martinez attends a demonstration with French labour union members and workers as France faces its 38th consecutive day of strike against French government's pensions reform plans, in Paris, France January 11, 2020. REUTERS/Gonzalo Fuentes

French CGT labour union leader Philippe Martinez attends a demonstration with French labour union members and workers as France faces its 38th consecutive day of strike against French government's pensions reform plans, in Paris, France January 11, 2020. REUTERS/Gonzalo Fuentes

French CGT labour union leader Philippe Martinez attends a demonstration with French labour union members and workers as France faces its 38th consecutive day of strike against French government's pensions reform plans, in Paris, France January 11, 2020. REUTERS/Gonzalo Fuentes

French CGT labour union leader Philippe Martinez talks to journalists after a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez leaves after a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez talks to journalists after a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez talks to journalists after a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez speaks to journalists after a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez arrives to attend a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez arrives to attend a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez arrives to attend a meeting with the French Prime Minister at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau

French CGT labour union leader Philippe Martinez attends a meeting with French Prime Minister Edouard Philippe at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau/Pool

French CGT labour union leader Philippe Martinez attends a meeting with French Prime Minister Edouard Philippe, Health and Solidarity Minister Agnes Buzyn and High Commissioner for Pension Reform Laurent Pietraszewski at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau/Pool

French CGT labour union leader Philippe Martinez attends a meeting with French Prime Minister Edouard Philippe and Health and Solidarity Minister Agnes Buzyn at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau/Pool

French CGT labour union leader Philippe Martinez attends a meeting with French Prime Minister Edouard Philippe at the Hotel Matignon in Paris as France faces its 37th consecutive day of strikes against French government's pensions reform plans, January 10, 2020. REUTERS/Charles Platiau/Pool

A demonstrator holds a CGT labour union placard depicting French President Emmanuel Macron at a demonstration in Paris during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. The slogan reads "our rights burned and blooded." REUTERS/Charles Platiau

Workers on strike hold CGT labour union placards as they attend a demonstration in Paris during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Charles Platiau

Workers on strike hold CGT labour union placards as they attend a demonstration in Paris during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Charles Platiau

French CGT dock workers on strike attend a demonstration in Marseille during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. The banner reads, "Don't touch our pensions". REUTERS/Jean-Paul Pelissier

French CGT dock workers on strike attend a demonstration in Marseille during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Jean-Paul Pelissier

French CGT dock workers on strike attend a demonstration in Marseille during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Jean-Paul Pelissier

French CGT workers on strike attend a demonstration in Marseille during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Jean-Paul Pelissier