What about Esther Wilson Yourn Lanchester DQ 1878? I believe her mother was christened Mary Uren in Chacewater, Truro in 1854. I think you'll find her family there in 1841 but they appear to have left by 1851. Many Cornish miners were migrating to the Durham coalfield at that time. Young is not a Cornish name so I've been hunting for alternatives. When a child was born before marriage it was often given the names of both parents.
I joined the forum, a couple of days ago, after finding your request for info on James Wilson and Ann Reay. They are my ggg gparents. How did you get on with the search for their parents? I might be able to help.
PS Urens are still in Chacewater, Kenwyn, Truro in 1851 census. Have you seen the free Cornwall Online Census Project?