Mary and family on the 1911, on FamilySearch:
https://www.familysearch.org/ark:/61903/1:1:XW73-HHJWilliam’s folks and siblings:
https://www.familysearch.org/ark:/61903/1:1:XW73-4GYJamjar
Added: William Jnr in Kent on the 1911?
https://www.familysearch.org/ark:/61903/1:1:XWDJ-LWFHis baptism:
Name: William Lancaster
Event Type: Baptism
Event Date: 29 Sep 1890
Event Place: Sneyd, Staffordshire, England, United Kingdom
Event Place (Original): Sneyd, Staffordshire, England
Parish: Holy Trinity
Father's Name: William Lancaster
Mother's Name: Louisa Lancaster
Affiliate Image Identifier: D4196/1/3
Mary Laura marriage? Sep 1940 Lancaster Mary L to Evans Edward J Surrey S.E. 2a 2042
There is a daughter A... born in 1920 and an unnamed male born in 1922 to Lancaster/Kitching of Wolstanton.
Death of a son Walter and unnamed male?:
Mar 1920 LANCASTER Walter 0 Wolstanton 6b 154
June 1922 LANCASTER Male 0 Wolstanton 6b 75
Is this William’s brother Ralph on the 1911?
https://www.familysearch.org/ark:/61903/1:1:XW73-3QHRalph’s marriage and death?:
Dec 1915 Lancaster Ralph W to Westwood May Stoke T. 6b 528
Sept 1917 Lancaster Ralph W 28 Wolstanton 6b 111
Name: Ralph William Lancaster
Event Type: Baptism
Event Date: 24 Mar 1889
Event Place: Sneyd, Staffordshire, England, United Kingdom
Event Place (Original): Sneyd, Staffordshire, England
Parish: Holy Trinity
Birth Date: 27 Feb 1889
Father's Name: William Lancaster
Mother's Name: Louisa Lancaster
Affiliate Image Identifier: D4196/1/3