You might be able to check entries in trade directories against known addresses at the time for the family? That is, if you are sure they were working on a large enough scale. One or two who were "shoe menders" in fact, working from home, put "shoe makers" onto forms - it sounded a bit better! Might the "Wiganworld" site with its various directories, cover Westhoughton, and be of some help to you?
Is it the ones on 3 Chorley road in 1911?
Ooops, rosie99 has posted while I was trawling online directories