MPs have warned that the Government's moves to tackle irresponsible dog ownership do not go far enough.
Plans to close a loophole which allowed dog owners to escape prosecution if the animal attacked someone in a private property have been announced.
Backed by the Environment, Food and Rural Affairs Select Committee, it said the plans fell short of creating a "comprehensive and effective regime for tackling the increasing problem of out-of-control dogs".
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Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.
The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.