More on KentOnline
Police are hoping to stave off clashes after right-wing groups announced they are planning fresh Dover protests.
The latest dates for demonstrations - Saturday, May 28 and Sunday, May 29 - come after a series of clashes with anti-fascist groups, which sparked violence and arrests earlier this year.
Fears of a repeat of the clashes, which led to more than a dozen arrests in April and January, failed to materialise on St George's Day, when far right groups didn't show.
Protests on April 2 by far-right East Kent Alliance and rival group Kent Anti Racism Network resulted in more than a dozen arrests for offences including possession of offensive weapons as well as in connection with the previous protest.
Police managed to keep rival groups apart as they gathered at the port.
An earlier clash on January 30 involving far-right East Kent Alliance and a counter protest on Kent Anti Racism Network was more chaotic and violent, with six people reportedly injured in Dover town centre.
Twenty weapons were seized by officers during the demonstration and three people arrested.
Kent Police have said that a "proportionate response" is being planned for the latest demonstration, to "facilitate peaceful protest."
A statement said: "Kent Police respects anyone's right to peaceful protest, and its intentions will be to balance that right with the rights of other people in Dover such as members of the public and local businesses.
"Kent Police and other partner agencies will continue to work closely with the local community in the lead-up to the demonstrations, and every effort will be made to ensure it is business as usual in the town."
It is not known how many people are expected.