Two former UBS traders have been charged by United States prosecutors in connection with efforts to manipulate Libor interest rates.
The move comes after the Swiss bank was fined £940 million by regulators for "extensive and widespread" attempts to rig interbank lending rates.
Former traders Tom Hayes and Roger Darin have been charged with conspiracy to manipulate the interbank lending rate. Mr Hayes has also been charged with wire fraud and an antitrust violation.
More top news
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.