I've been looking at Alfred Johnson and come up with this. Needs confirming.
There is a army service record for an Arthur Johnson born 1897 Birmingham. I must have another look as I only took brief details, but his next of kin was his mother, Bertha living in Green Lane, Small Heath, Birmingham, and I think he joined in 1915
His no was M302300 ASC, his job at the time a turner at the Lanchester Motor Co
I then found Arthur in the 1901 census with parents Providence and Bertha
-------------------------------------------------
1901 England Census
about Alfred Johnson
Name:
Alfred Johnson
Age:
3
Estimated birth year:
abt 1898
Relation to Head:
Son
Gender:
Male
Father:
Providence Johnson
Mother:
Bertha Johnson
Birth Place:
Birmingham, Warwickshire, England
Civil Parish:
Aston
Ecclesiastical parish:
St Andrew
County/Island:
Warwickshire
Country:
England
Street address:
Occupation:
Condition as to marriage:
Education:
Employment status:
View image
Registration district:
Aston
Sub-registration district:
Deritend
ED, institution, or vessel:
84
Neighbors:
View others on page
Piece:
2864
Folio:
83
Page Number:
32
Household schedule number:
192
Household Members:
Name
Age
Sarah Taylor 51
Kate Taylor 18
Harry Taylor 16
Eliza Henning 25
Thomas Henning 4
John Hemming 2
Providence Johnson 24 S.I.Law, Lab at steelworks, Birmingham
Bertha Johnson 23 (nee Taylor? married 1898, see 1911)
Alfred Johnson 3
-----------------------------------------------
1911 England Census
Name:
Alfred Johnson
Age in 1911:
12
Estimated birth year:
abt 1899
Relation to Head:
Son
Gender:
Male
Birth Place:
Birmingham
Civil Parish:
Aston
County/Island:
Warwickshire
Country:
England
Street address:
5 Fir Terrace Little Green Lane Small Heath Birmingham
Occupation:
School
Registration district:
Aston
Registration District Number:
385
Sub-registration district:
Deritend
ED, institution, or vessel:
33
Piece:
18180
Providence Johnson 34 Gun worker Small Heath
Bertha Sabina Johnson 33 Small Heath
Alfred Johnson 12 Small Heath
married 13 yrs 1 child
So this may have got you into the census years