In the 1880s my great-grandmother and her mostly teenage children also moved to Burnley, though from Huntingdonshire, where the family members were mainly ag labs and cobblers. We assume this was to find work, as all of them did, though in various jobs - railway workers, shop assistants (Grandfather, who had just left school, became a draper's apprentice), factory workers, etc. Why Burnley? Well, they already had cousins who had made the same move some years earlier, so my widowed gt-grandmother took her tribe to join them after hearing of job prospects up there.