Hello Keeley, Just trying to help you with your query.
I found a ref for a Tom Hopkinson who married a Mary Ann TWIGG in Chesterfield, Derbyshire in 1899. I believe I found them in the 1901 census. Thomas is listed as a Coal Hewer..born in Handley, Derby. Mary A.born in Unston, Derby. They may or may not be your Hopkinson's. However, I found ref's to the births of the children you listed= Minnie..Ronald and Dorothy.They were registered in the Chesterfield district of Derbyshire. Unston comes under the reg disc't of Chesterfield where Mary A was born. It might be worth your while to order a birth cert to establish maiden name of mother of the children you listed.
Patrick. -=-==- + MOUNFIELD..
AHorace M. Mounfield was born in Bucklow, Cheshire, U.K. in the Dec Qtr of 1911.Knutsford comes under the Reg's Disc't of Bucklow. I checked further and found his mothers maiden name was FRITH. A Mark Mounfield married a Ellen FRITH in Runcorn, Cheshire, in 1905. I think another child was born in 1909 named Marjorey Ellen Mounfield. -=-==--=
A Horace M. Mounfield married a Phyllis M. MOUNFIELD in Runcorn Disc't of Cheshire, in 1938.