MARTIN - Harold Leonard b 1894, Richard Flute b 1860/61

I am trying to add to my husband's family for his mother, Gwendolin F Martin, b 1922 in Medway, Kent. She turns 90 this summer. Any help with death date for Harold Leonard Martin, information for Richard Flute Martin would be much appreciated.  Maternal names include mother, Jessie Evelyn Bell b 1900, and maternal grandfather, William George Fabian Bell, b 1871. He worked with the Short Brothers in the early airline industry.  Thanks from Atlanta, GA, USA.