UPDATE: In response to your PM for
https://www.wikitree.com/wiki/Lowther-938...
The following should (hopefully) be helpful in helping you out with further research. Your more than welcome to use the following information (and Sharable Ancestry Links) to source his profile and for research itself.
[Please Note: The first source does provide his service number that is always helpful in locating military information.]
1) UK, World War II Royal Artillery Tracer Cards, 1939-1948
Source:
https://www.ancestry.com/sharing/23206132?h=1a217d
Details:
Name: William Arthur Lowther
Regiment: Royal Artillery
Military Unit: 1 Survey Regt RA (TA)
Service Number: 914498
2) UK, Burial and Cremation Index, 1576-2014
Source:
https://www.deceasedonline.com/servlet/GSDOSearch?DetsView=Summary&src=ext&fileid=5416434
Details:
Name: William Arthur Lowther
Death Date: 18 May 1992
Burial or Cremation Date: 22 May 1992
Burial or Cremation Place: Greater Manchester, England
3) England & Wales, Civil Registration Marriage Index, 1916-2005
Source:
https://www.ancestry.com/sharing/23206321?h=48581a
Details:
Name: William A Lowther
Registration Date: Jul 1945
[Aug 1945]
[Sep 1945]
Registration Quarter: Jul-Aug-Sep
Registration District: Manchester
Inferred County: Lancashire
Spouse: Florence A Collins
Volume Number: 8d
Page Number: 1186
I do wish you the best of luck in your Journey! :-))
~Brian Kerr