Devon and Cornwall Police reported that six persons were arrested in Plymouth, and many policemen were injured in the incident.
In South Belfast, riot officers were attacked with stones and petrol bombs near a store that was set on fire over the weekend.
Previously, a vigil was held for the victims of a horrific stabbing in Southport last week, which caused the turmoil. Almost 400 people have been arrested since the riots began.
In Southport, hundreds of people attended the peaceful tribute a week after the deaths of Bebe King and Elsie Dot Stancombe.
At a Taylor Swift-themed holiday club, children blew bubbles while others placed flowers and heart-shaped balloons in honor of the victims of the knife incident.
Merseyside Police have subsequently stated that one youngster involved in the incident remains in hospital, but all other children have been discharged.
