Here you go, Sarah.
I couldn't find William's parents in 1871, but I have to admit I haven't tried very hard yet - it's late, you know!

If you want, I will have a further hunt for them tomorrow.
Here is what I have found so far:
1861RG9/2503 Folio 3 Page 10
37 South Parade, Friar's Gate, Derby
ANSELLSamuel Head Mar 39 Lay Agent to Pastoral Aid Society Herts, Ware
Agnes Wife Mar 37 Lancashire, White Chapel
John F Son 14 Scholar Derby
Alice H Dau 5 Scholar Derby
William E Son 4 DerbySusan A Dau 3 Derby
Arthur S Son 2 Derby
Sarah ALLUM Servant Un 20 Herts, Standon
1871RG10/5283 Folio 38 Page 4
The Parsonage, Casterton
Francis James ARMITAGE Head Mar 48 Perpetual Curate of Casterton Sussex, Felgate Hall
Helena ARMITAGE Wife Mar 49 Lancashire
James A ARMITAGE Son 13 Scholar Margate
Edward ARMITAGE Son 11 Scholar Weston Super Mare
William Edmund ANSELL Nephew 14 Scholar DerbyJane ANSELL Niece 9 Derby
Alice HIND Visitor Unm 25 Governess Lincolnshire, Harenston
Mary JONES Serv Un 25 Domestic Gloucestershire, Apperley
Emma GWYNN Serv Un 23 Domestic Worcestershire, Marbloy [?]
Fanny WOREMINGTON Serv Un 14 Domestic Worcestershire, Broadwas [?]
Enjoy!
Prue (a fellow Queenslander)