Re your comment: If the death was 1919 ---does this not mean the man died in UK ??

When the Great War ended in November 1918, soldiers weren't immediately dismissed and sent home. Think of the logistics of getting all those soldiers back across the Channel!

Also many regiments were assigned to the British Army of Occupation that did garrison duty in the Rhineland from 1919 to 1920.

Finally there were huge military hospitals in France, Belgium and Germany that took a long time to clear up.

in the CWGC I found the name of a cousin of my Scottish grandfather. The cousin died in 1919 in Namur, Belgium. Now Namur was in German hands at the Armistice but a bit of googling found "A Casualty Clearing Station was set up here at the end of the war and hence many of the burials here died after the armistice."