1911 Census says they had been married for 18 years. Tellingly, their oldest is given as 19 years old.
Sorry I can't find their marriage anywhere
The only Bunn/Olley marriages I can find are
1922 Barton I
Frank F W to Mary H E
And
1891 Erpingham
James Bunn to Mary Ann S Olley
Married 25 Jan 1891Stody, Norfolk, England
The above couple can be found on 1891 census
James Bunn Head 23 1868 Bricklayer
Sebrina Bunn Wife 25 1866 -
Ellen R Olley Daughter In Law 3 1888
Baptism Stody 30 Dec 1888 born 03 Mar 1888
Ellen Rose Olley to Mary Ann Sebrina, no father named
And the only marriage for a person named Alexander OLLEY I can find is this one
1880 Lexden
Alexander William Olley
To either
Alice Sainty / Harriet Smith
1881 census shows
Alice OLLEY b1859 living with her parents James & Mary Ann SAINTY – no husband with her
1891c
Alice OLLEY
mar. has 5 children, no husband at home
children Ida F(lorence) 8, Charles A(lexander)5 , Victor L(ionel) 3 , Norman T(hornley) 2 & Dora (Jane) 0
RG12 Piece/Folio 1395/ 39 Page Number 29
and 1901
Alice OLLEY is noted as widow
her children appear to be
William (James) 20 (1881) he died 1903 age 22
Charles 15, Victor 14, Norman 12 , Dora 10, Gertrude (Ellen) 9,
Stanley (Sainty) Olley 8 (1893)
All the childrens births are reg. Lexden Essex
There's a death Maldon (Essex) 1929 for an Alice OLLEY age 70 (1859)
I can't find a birth or a death entry for an Alexander William Olley
only these birth/death entries
1859 Erpingham Alexander Olley
and
1923 Barton upon Irwell Alexander Olley age 64 (1859)