British cross-Channel travellers have been warned they face major disruption on Monday as French shopkeepers, police, unionists and farmers join hauliers in calling for the northern section of the migrant camp at Calais to be demolished.
Pressure has been growing on the French authorities to tackle the problem, which has seen the camp swell in size in recent months.
The slum's southern section was dismantled earlier this year, but up to 9,000 migrants from countries including Sudan, Syria and Eritrea are still living there in squalor.
Lorries and tractors are set to gather at Dunkirk, to the north of Calais and Bolougne to the south, at 7.30am (local time), according to the Road Haulage Association (RHA) chief executive Richard Burnett.
The RHA said 200 French farmers are joining in the protest, angry at migrant action that has resulted in destroyed crops and extensive damage to farms in the area.
People traffickers are reported to be going to extreme lengths in Calais in their efforts to reach the UK, with vehicles being torched, petrol bombs thrown and trees being cut down to block roads before drivers are threatened with chainsaws and machetes.
Gangs are paid thousands of pounds by vulnerable people to get them to Calais, from where some are smuggled to Britain to work to pay off huge debts to people traffickers.
People traffickers have even been deliberately causing car crashes on the roads to the port by hurling large objects at cars and then stowing away on lorries caught up in the traffic jams that pile up behind.