Anti-migration protesters clashed with police and blocked the dual carriage way in Dover.
Rival groups gathered in the coastal city of Kent to demonstrate the arrival of thousands of migrants in small boats.
Traffic on the A-20 was frozen in both directions after protesters demonstrated in large numbers on the road.
Many wore Union flag face masks and carried banners, while others chanted “England sesame I will die” and sang the rules of Britannia.
At one point, several officers were seen stopping the man on the ground. The man was later arrested, police said.
There have also been other sporadic clashes, with at least 100 police officers at the scene by A20.
Earlier, a group of about 60 people, chanting anti-government slogans, were seen marching towards the Dover Seafront.
It is believed that groups from across the country have traveled to Dover.
Meanwhile, pro-migration activists gathered in the town’s Market Square for a demonstration organized by the Kent Anti-Racism Network.
Peter Kane of Kent Refugee Help, addressing a crowd of about 100 people, said that when society sees those fleeing war and turns them around, “that says something about the state of your society.”
He added: “We are not those people. We stand up and welcome people who are in dire straits fleeing horrific situations.”
Words like “Rise up on fear. Refugees welcome” were introduced by the humanitarian charity Freedom from Torture on White Cliffs Do Dover on Friday night.
According to analysts – more than 1,450 migrants arrived in the UK by small boat in the month Gust – is believed to be a one-month record.
Figures from the PA News Agency show that the number of migrants heading to Britain by sea this year is now more than 600.
Last month also saw a new single-day record for immigrants 416 surpassed the English Channel Arrive the UK coast in small boats on Wednesday.
Downing Street said the figure was “completely unacceptable.”
Home Secretary Preeti Patel recently pledged to make the route “completely unavoidable” for those seeking to cross the channel to seek refuge.
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