Late last night, Paris police also ordered a change in the route for the main march that's been organised by trade unions.

Originally, protesters had been given the green-light to march from Bastille to Nation squares in the centre, with the rally to commence in the late morning.

However, in their decree banning the route, police said such a procession presented "serious risks of public disorder, particularly due to the high density of businesses similar to those targeted during the 17-18 October weekend."

Demonstrators can now only march from from 1pm to 7pm. Organisers had scrambled a legal challenge but that has failed, and groups are now preparing for a 2pm start.

The new route is on the outskirts of the Parisian ring, through the 13th and 12th arrondisements.

Paris's streets are pretty quiet at the moment. Police are out in full force guarding the main squares and government buildings, metro stations are closed, and most retail shops are closed or about to shut up shop.

Following last weekend's unrest, authorities across France moved to try to restrict demonstrations, limiting gathering numbers and march routes and issuing blanket bans in some cities.

That led to groups seeking permission for "authorised" protests with mixed results. For example, in Paris, the leading trade union was granted permission for their march while the Yellow Vest demonstrators were denied.

The bans have also sparked last-minute legal challenges from civil rights groups.

And now in the past hour, courts have overturned two protest bans – in the and also in the city of , which saw its centuries-old city hall set on fire last week.

Other cities that have bans in place for "unauthorised" demonstrations include:

• Paris, Lille, Strasbourg, Mulhouse, Grenoble, Toulouse, Amiens

Of course, many protesters – from students to union groups – have said they will march anyway regardless of the bans or rules around where and when they can demonstrate.

The mood in Paris was heightened by fear and horror after what the government said was "racist, terrorist attack" in two towns west of the city on Friday.

A 26-year-old, well-respected martial arts star from a club outside Paris was killed and five other people were injured, including a 12-year-old girl shot eight times as a gunman pointed an automatic weapon from his car.

The French president, Emmanuel Macron, said they were targeted because of the colour of their skin.

"These people were targeted because of their skin color or perceived religion, and for no other reason," he said during his visit to Trappes, one of the affected towns, on Friday afternoon. "There is no place for this in France."

"There are no words," wrote the sports club of the 26-year-old victim, the ATCH Academy. "Nothing could justify a life being torn away like this."

Several of France's leftwing political leaders have already shown up at the rallies in protesting against and her anti-immigrant party.

The demonstrations against "racism, fascism and imperialism" are being held as the National Rally's congress takes place this weekend and Le Pen launches her presidential campaign.

"It was important for me to come here to Orléans," said Bally Bagayoko, the mayor of Saint-Denis, saying he was there to stand up against racism and the hate speech spread by the right.

He also directly referenced the "close link" between hateful rhetoric from parties like Le Pen's, and the drive-by shooting outside of Paris on Friday morning which the town's mayor had said appeared to be targeting people of African origin.

Sophie Binet, General Secretary of the CGT union, also began her address to protesters by addressing the Trappes attack.

I want to express our support and condolences to the victims, their families, and all the residents of Trappes.

This violence does not come from nowhere, it comes from speeches that convey racism, anti-Semitism, violence, which essentially come from the speeches of the far right.

The Socialist party leader, Olivier Faure, has also been seen in the crowds, marching behind an "All united against fascism" banner.

Tension was also high in the city of on Saturday as Marine Le Pen's far-right, anti-immigration National Rally party gathers for its annual congress and the official launch of her presidential campaign.

The police presence in the city has been stepped up as around 5,000 party members and officials gather on Saturday and 10,000 attend Le Pen's first campaign rally on Sunday.

A protest march by the left has been organised against "racism, fascism and imperialism". Between 20,000 and 30,000 people are expected to demonstrate against the far right in the city.

Several political personalities on the left were to attend the Orléans march including the leader of the Socialist party, Olivier Faure, the head of the leftwing CGT union, Sophie Binet, and the mayor of Saint-Denis, Bally Bagayoko, from the party La France Insoumise.

The capital's authorities have shut down the stations in a bid to contain crowds and curb movement throughout the city today.

The affected stations are: Argentine, Assemblée Nationale, Bel Air, Champs-Elysées – Clemenceau, Charles de Gaulle – Étoile, Cluny - La Sorbonne, Concorde, Daumesnil, Dugommier, Franklin D. Roosevelt, George V, Mabillon, Maubert – Mutualité, Miromesnil, Odéon, Picpus, Rennes, Rue du Bac, Saint-Germain-des-Prés, Saint-Sulpice, Sèvres - Babylone, Solférino, Tuileries and Varenne.

We've seen other attempts by authorities to restrict movement in cities across France for this weekend; authorities earlier this week said they would suspend public transport services on Saturday; they were forced to reverse the decision following outcry.

In , which is hosting the far-right National Rally congress, the tram lines are suspended and bike-sharing rentals have been removed from the city centre.

All through the night in neighbourhoods in the centre and east of Paris, the sound of sawing, drilling and hammering rang out as wooden boards were hastily secured into place to cover windows and shop-fronts.

Businesses being boarded up included opticians, supermarkets and pharmacies as well as trainers and handbag stores.

At a public meeting at Paris city hall this week, some shop-owners had cried as they spoke of their fears of businesses being smashed and looted again this weekend.

"I'm afraid there isn't enough wooden board left to protect shops and the demand is making it so expensive to board up shops," one optician near Châtelet in the city centre said. "We'll close up and take all our stock of glasses out of the shop."

Good morning and welcome to our live coverage of events in Europe – we will be closely following protests across the continent today.

In France, hundreds of thousands are expected at rallies across the country, with high school students, unionists, "yellow vest" demonstrators and others turning out for a fourth weekend of protests demanding more government funding for schools and measures to help with housing and the cost of living.

Desperate to avoid the looting and property damage seen on the fringes of some protests last weekend, French authorities have ramped up restrictions on where protesters can march and which groups are "authorised" to do so. They've increased policing 20%, mobilising 70,000 police officers and soldiers to the streets, including both elite units and trainee officers.

Community tensions are also high following a deadly shooting on Friday west of Paris where the gunman targeted non-white people, killing one person and injuring five others including a child. The French president called it a "racist terrorist attack".

Meanwhile, Marine Le Pen's anti-immigration party is also due to hold its national conference in the central city of Orléans. The far-right National Rally's meeting is expected to draw up to 30,000 counter-demonstrators.

Protests are also being held in Italy, Spain, Austria, Portugal, Albania and Ireland today.

Stay with us for all the developments.