Downing Street has branded the overnight scenes of rioting in Cardiff that followed the deaths of two young boys in a crash as "appalling and completely unacceptable".
On Tuesday morning, Prime Minister Rishi Sunak's official spokesman said: "The reports of disorder, violence, arson and specifically attacks on police officers are appalling and unacceptable.
"We remain grateful to the emergency services and first responders for all their support to the community and restoring order."