I have looked at old newspaper articles to gather evidence about the Stockport riots of 1852. Trouble started when famine starved Irish families had come to Stockport looking for work in the mills. This hard work was resented by the local community as taking English jobs and wooing and marrying English women.
At this time, religious processions which used icons or clergymen in vestments were banned. But each year, the Irish community held a legal procession for the children in the three local Catholic schools. It complied with the law and had no Catholic symbols, icons or clergy in vestments. The procession was therefore a legal one.
... is that the spark that fanned the flame... or was it waiting to happen?