The death of Sidney Thomas Miller was reported in the Bromley & District Times newspaper, though limited information was given on the regiment he served with.
A search of the Commonwealth War Commission website brings up a Private S T Miller [Service Number 31417], of the 1st Battalion Essex Regiment, who died on the 16th March 1917 in France. Perhaps this is him?
This report appeared in the local newspaper:
Another of our brave young heroes to pass silently to rest, as a result of wounds received whilst fighting his country’s enemies, is Sidney Thomas Miller, son of Mr & Mrs Miller, of Vauxhall Place, Lowfield Street, Dartford.
Admitted on March 15th to hospital in France, suffering from severe shrapnel wounds in his left arm and leg, and having already had to have the arm amputated, he lingered for thirty hours, and then passed quietly away on March 16th, and was reverently buried, with a cross to mark his last resting-place.
Source:
Bromley & District Times, 6th April 1917, page 2
www.cwgc.org/find-war-dead/casualty/427024/miller,-/