In the October to December 1899 birth index Edwin Charles Brown, Fulham, London, volume 1a, page 348.

In the 1901 census 93 Sultoan? Crescent?, Paddington, London, part of St Simon’s parish.
Head George E. Brown, age 29, electrical engineer’s storekeeper, worker, born Chelsea, London.
Wife Martha A. Brown, age 27, born Westminster, London.
Daughter Ethel M. Brown, age 4, born Fulham, London.
Son Edwin Charles Brown, age 1, born Fulham.

In the 1911 census 31 Northcroft Road, West Ealing, London.
Head George Edwin Brown, age 39, storekeeper for an electrical engineer, worker, born Chelsea, London.
Wife Martha Brown, age 37, married 15 years, 3 children born alive, all still living, born Westminster, London.
Daughter Ethel Brown, age 14, school, born Fulham, London. S
on Edwin Brown, age 11, school, born Fulham.
Son Leonard Brown, age 6, school, born Willesden, Middlesex.
The house had 5 rooms.

British Army WWI Service Records
Attested September 11, 1917, Hounslow
Edwin Charles Brown Regimental Number 104038
36 Woodstock Avenue, West Ealing, Middlesex
82nd Training Reserve Battalion
Age 17 years 305 days
occupation clerk
single
no previous military service
Willing to enlist in the The Royal Flying Corps
next of kin father George Edwin Brown, 36 Woodstock Avenue, West Ealing, Middlesex
His statement of service is joined as a private September 11 1917 RFC, transferred to the East Surrey Regiment December 14, 1917
There is no other record of service, perhaps he was kept in training or was never called up, possibly due to his age.