26-year-old Richard Donovan has been told he must at least 30 years in prison before being considered for parole.
Dover: More Images Released After Protests
Officers investigating trouble which broke out during demonstrations in Dover earlier this year after released eight images of people they want to speak to.
Violence flared when rival groups stage protests in the town on 30 January 2016.
Seventy-four arrests have already been made in connection with the march and separate counter-protest. Of those 57 have been charged.
Detectives continue to review CCTV and social media footage of reported offences and would like to hear from anyone who recognises those pictured.
People came to Dover from across the UK on the day and anyone with information is urged to call the appeal line on 01843 222289 quoting `Operation Skep’ or email firstname.lastname@example.org .
Alternatively call Kent Crimestoppers anonymously on 0800 555111.
18-year-old Ben Savage from Rochester missing after a night out.
16-Year-Old Kelly Turner has a very rare cancer and without surgery Kelly has just a years to live.
Jack Howard has died from a rare form of cancer just weeks after pioneering treatment in LA
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