Simon Glancey has submitted the following:
Serjeant Walker was fatally wounded while flying as an Observer in Fe2b 6985 of 11 Squadron, which had been escorting bombes to attack Bapaume.
The Berwickshire Advertiser 29/09/1916 reported the following:
DIED OF WOUNDS
Died of wounds on September 16th, 1916, in Field Ambulance, France, Sergeant David Brown Walker, Royal Flying Corps (aged 19 years and ten months), youngest and dearly beloved son of Thomas and Catherine Walker, 12 Tower Road, Tweedmouth.
He is remembered in Berwick on B25.01 and B25.21 and in Tweedmouth on T31.01