British Prime Minister Keir Starmer on Sunday condemned what he described as "far-right thuggery" and said perpetrators would face the full force of the law after days of violent anti-immigration protests culminated in hotels being targeted.

Violent protests have erupted in towns and cities across Britain after three girls were killed in a knife attack at a children's dance class in Southport in northwest England last week.

The murders were seized on by anti-immigrant and anti-Muslim groups as misinformation spread that the suspected attacker was an immigrant and a radical Islamist. Police have said the suspect was born in Britain and are not treating it as a terrorist incident.