Dover has been brought to a standstill by a huge police operation as far-right and counter anti-fascist groups protest.
Roads have been closed as demonstrators march separate routes through the port town in Kent, The Press Association reported.
Police have lined the streets in a bid to prevent a repeat of violent clashes between the two groups in January.
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Anti-immigration demonstrators chanted "no more refugees" as they set off, surrounded by police.
Highways England tweeted that traffic was being held on the A20 in both directions between the B2011 and A256 and on the A2 between the A20 and A256.
Kent Police said eight people had been arrested in Marine Parade for failing to comply with conditions regarding the right to assembly which include a prohibition on wearing masks.
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Police try to clear the road of anti-racism demonstrators attempting to block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
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Police officers march with a group of far-right protesters in Dover, Kent, who are protesting against the arrival of immigrants; the Kent Anti-Racism Network have also organised a counter-demonstration.
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A woman holds a placard that reads 'Racism Hurts Everyone' as anti-racism demonstrators block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
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A man is led away by police as anti-racism demonstrators block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
JUSTIN TALLIS via Getty Images
A woman holds a placard that reads 'Racism Hurts Everyone' as anti-racism demonstrators block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
JUSTIN TALLIS via Getty Images
A man is led away by police as anti-racism demonstrators block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
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Police officers look on at members of a counter demonstration by the Kent Anti-Racism Network near the docks in Dover, who are protesting against far-right groups who are marching in the town protesting against the arrival of immigrants.
JUSTIN TALLIS via Getty Images
A man is led away by police as anti-racism demonstrators block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Steve Parsons/PA Wire
A line of police officers in front of a group of far-right protesters in Dover, Kent, who are protesting against the arrival of immigrants; the Kent Anti-Racism Network have also organised a counter-demonstration.
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JUSTIN TALLIS via Getty Images
Police try to clear the road of anti-racism demonstrators attempting to block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Steve Parsons/PA Wire
A European flag is burnt by a supporter from a group of far-right protesters, who are marching though Dover in Kent, the group are protesting against the arrival of immigrants; the Kent Anti-Racism Network have also organised a counter-demonstration.
Steve Parsons/PA Wire
A group of far-right protesters march though Dover in Kent, the group are protesting against the arrival of immigrants; the Kent Anti-Racism Network have also organised a counter-demonstration.
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Police officers talk with a man at Dover Priory station in Dover, Kent, a head of a protest by far-right groups protesting against the arrival of immigrants and the Kent Anti-Racism Network, who have organised a counter-demonstration.
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A heavy police presence outside Dover Priory railway station in Kent, as they aim to prevent the repeat of violence between far-right groups protesting against the arrival of immigrants and the Kent Anti-Racism Network, who have organised a counter-demonstration.
Steve Parsons/PA Wire
Police officers talk with a man at Dover Priory station in Dover, Kent, a head of a protest by far-right groups protesting against the arrival of immigrants and the Kent Anti-Racism Network, who have organised a counter-demonstration.
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Police surround anti-racism demonstrators as they block the route of a planned far right march through Dover, southern England, on April 2, 2016. / AFP / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)