Please answer the following question: Facts:   - death date: 14 august 1934    - allegiance: united kingdom    - relations: constance -rrb- leisa louise -lrb- grand-daughter -rrb- mary -lrb- daughter -rrb- edwin john -lrb- son    - rank: second lieutenant      - awards: military cross    - birth date: 11 april 1898    - serviceyears: 1917 -- 1919    - name: john howard umney    - branch: british army royal air force    - unit: no. 22 squadron raf    - death place: reading , berkshire , england    - birth place: london , england   Based on these bullet points, write a short biography describing the life of john howard umney .
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