This looks to be dau Mary Ann's marriage
11 Apr 1905
Marlborough, St Mary the Virgin, Wiltshire,
Mary Ann Lusty age 22, 116 High Street,
father William, labourer
Frank Dance father Robert labourer
witnesses Alice Maria & Frederick Henry Dance
LUSTY, MARY ANN
mmn ALEXANDER 1883 M Quarter in MONMOUTH Volume 11A Page 29
Mary Ann Lusby
[Mary Ann Lusty]
Marriage Date: 11 Apr 1905
Marriage Place: Marlborough
Document Year: 1917
Residence Place: 14 Kingsbury Square, Marlborough
Relationship to Soldier: Spouse
Form Title: Descriptive Report Enrolment
Family Members:
Francis Dance Self (Head)
Florence May Dance Child
Francis William Dance Child
Ethel May Dance Child
Sorry can't explain why Mary Ann (Snr.s) husband would change his name (if it is the same person)

Do you have them together on the latest census?
Edit - surname is transcribed as Lushy on anc*y
familysearch has their surname as Lusty
He's William occ Crown Workman
https://www.familysearch.org/ark:/61903/1:1:X71R-S5Y