Police have released seven images of people they want to speak to in connection with the demonstrations in Dover on January 30.
The investigation into reports of criminal offences committed when far-right and left demonstrators clashed in the town, is still on-going.
More than 50 arrests have already been made in connection with the march and separate counter-protest.
Detectives continue to review CCTV and social media footage of reported offences and would like to hear from anyone who recognises those pictured, who could be from across the UK.
Anyone with information is urged to call the appeal line on 01843 222289 quoting Operation Skep or email email@example.com.
Alternatively call Kent Crimestoppers anonymously on 0800 555111.