The "DD" is on the memorial as if Sewell had 4 initials: "W. F. D. D." which seems unlikely so we've made him a Doctor of Divinity, which seems marginally more probable.

Person

War dead, WW1

1 memorial

J. O'Sullivan

Name on one of the corner plaques of the East Ham WW1 memorial.

Person

War dead, WW1

1 memorial

M. G. Lillingston

Worked at the Stock Exchange and died in WW2.

Person

War dead, WW2

1 memorial

M. I. Sharpley

J. Lyons & Co. Ltd. staff member who died in WW2.

Person, Armed Forces

War dead, WW2

1 memorial