In addition to these unhygienic living conditions, navvies shared housing, some even sleeping on floors. The majority of navvies were Englishmen, with 30% of the group being Irish. While this ratio varied from navvy shanty town to shanty town, sleeping arrangements were segregated. In at least one documented instance, a riot broke out between the two nationalities in one navvy shanty town, causing local magistrates to arrest 12 individuals. Though, this is not necessarily indicative of relations between the English and Irish in all navvy gangs.