In 1938 Charles was living at 154 Elizabeth St. Newham with his sister Edna. 
Charles and Violet had a daughter: Births Dec 1944
Brown Suzanne E Ashdown Lewes 2b 212
Probate: Brown, Charles Henry John of 91 Gibbon Road Newhaven Sussex died 4th January 1945 at Darvell Hall Sanatorium Robertsbridge Sussex Administration Lewes 17 February to Violet Eva Brown widow. Effects £386 12s.
Note: Darvell Hall was a hospital for sufferers from TB until 1948 - cf The National Archives.
Births BROWN, CHARLES HENRY JOHN (Mother HART) GRO Reference: 1911 J Quarter in WOOLWICH Volume 01D Page 1153
Marriages Mar 1944 ASHDOWN Violet E Brown Lewes 2b 347 BROWN Charles H J Ashdown Lewes 2b 347
Deaths BROWN, CHARLES HENRY JOHN 33 GRO Reference: 1945 M Quarter in BATTLE Volume 02B Page 88
From Find-a-Grave: Death: Jan. 4, 1945 BROWN, CHARLES HENRY JOHN Sergeant Service No:1263748 Age:33 Royal Air Force Volunteer Reserve Son of Charles Frederick and Ann Elizabeth Brown; husband of Violet Eva Brown, of Newhaven. Burial: Newhaven Cemetery, Newhaven, Lewes District, East Sussex, England Plot: 1048 FindaGrave.com
It may be possible to confirm family relationships with Charles by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Charles: