WW1 military records on Ancestry
On Ancestry UK there the following military records held for Hatherners
Soldiers who died in in Great War 1 (13 records)
Soldiers who served 1914- 1920 and their family members (63)
Pension records 1914 -1920 (23)
Canada, British Regimental 1756 -1900 (4)
Royal Aero Club Aviators 1910 - 1920 (1)
Royal Navy Registers of Seamen (1)
Women's Army Auxiliary Corps 1917 -1920 (1)
Chelsea Pensioners 1715 - 1925 (4)
You can see the search results here.
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Note that Ancestry also says there are 4 records for UK, Royal Hospital Chelsea Pensioner Admissions and Discharges, 1715-1925 but link to them is denied.