I have only seen brief mentions in social history textbooks (several years ago, and I can't recall which ones!) As far as I understand it, the "cottage industry" garment makers would follow the jobs - which would mean moving to areas near (or with good transport such as canals) to the textile factories which were predominantly in Lancashire or Yorkshire. It wouldn't necessarily have been for improved pay or conditions - more likely that local work dried up due to competition or fashion changes.
Given the level of literacy and the cost of newspapers I suspect most people would not read an advertisement for jobs but would rely on word of mouth.
