Had a quick look at Ancestry, there is a Florence May Jones living at 3 Broad Street Ll. Jnct in 1901 at age 7, family members are her mother Mary 41 (widow) b Holyhead John Frederick 15 Railway Porter b Holyhead, Ernest Henry 13, Hannah Elizabeth 10, George Edward 5, all born Conwy and a couple of Boarders.
This may or may not be the right family,bearing in mind the surname Jones and the fact that many in Llandudno Junction and Conwy were employed on the railways, but if you think it is worth more research I would be happy to do more look ups on Ancestry when I finish work.