Career
Only four other British subjects were executed under this Acting. Jose Estelle Key (a Gibraltarian), Duncan Scott-Ford, Oswald John Job (born in London of German parents) and Theodore Schurch. Armstrong was born in Newcastle and was a marine engineer by occupation.
He was tried on 8 May 1941 at the Central Criminal Court (the Old Bailey in London) and convicted for communicating with the German Consul in Boston, Massachusetts, to offer him assistance before the United States entered the Second World War.
His appeal on 23 June 1941, at the Court of Criminal Appeal, was dismissed, and on 10 July 1941 at the age of 39 he was executed by hanging at Her Majesty Prison Wandsworth by Thomas Pierrepoint.
