Thanks, CaroleW! I wondered about the 9 children on the 1911 Census. I wondered if the 'one had died' might have been Ellen. I also couldn't find any Espley children from their marriage, but given she was 38 when they married, she was probably quite 'old' for child-bearing by then.
BTW, I found a birth record for Wilhelmia at Birkenhead in Q1 1873 (Birkenhead, Cheshire, England, Volume 8a, Page 500) which tied in with her age (24) at marriage and death (27) in 1900, The baptism for this Wilhelmina was at Holy Trinity, Birkenhead and her parents were William and Sarah Taylor. Again, her Father is listed as William on the marriage record.
It's been an amazing journey finding so much for 'Tom Jr' (as I call him to differentiate from his Father, Tom Sr!) and I'm grateful to everyone who pointed me in the right direction!