The latest census information available is 1911, and even that's only fully available to subscribers.
England & Wales have a 100-year privacy rule.
However, 1901 census:
Reference RG13, Piece 1355, Folio 172, Page 9
98 High Street, Aylsbury, Buckinghamshire
Roadknight, William F Head M 41 Printer's Compositor b Walton Aylesbury, Bucks
Roadknight, Dora Wife F 43 b Leighton Buzzard
Groom, William Father-in-Law M 76 Living On Own Means b Leighton Buzzard
I can also confirm that they were living on the Isle of Wight in 1911.
Going back to 1881, we find:
Reference RG11, Piece 1473, Folio 35, Page 20
5 Friarage Terrace, Aylesbury
Roadknight, William J Head M 48 Journeyman Printer b Linslade, Bucks
Roadknight, Sarah Wife F 49 b Leighton Buzzard
Roadknight, William F Son M 21 Printer & Compositor b Aylesbury
Roadknight, Lizzie Daughter F 15 Dressmakers Apprentice b Aylesbury
Roadknight, Alice L Daughter F 8 Scholar b Aylesbury
And finally, a marriage:
September qtr 1884
Leighton Buzzard Vol 3b, page 700
Roadknight, William Farquharson
Groom, Deborah Ann