ict ▁Stewart ▁ ▁( 2 4 ▁May ▁ 1 9 2 7 ▁– ▁ 1 2 ▁September ▁ 1 9 9 5 ) ▁was ▁a ▁British ▁ge ologist , ▁colonial ▁administrator ▁and ▁diplom at ▁who ▁was ▁the ▁first ▁British ▁amb assador ▁to ▁the ▁un ified ▁Vietnam . ▁ ▁Career ▁Stewart ▁was ▁at ▁school ▁at ▁St ▁Ill ty d ' s ▁College ▁in ▁Card iff ▁( now ▁St ▁Ill ty d ' s ▁Catholic ▁High ▁School ), ▁then ▁served ▁in ▁the ▁Royal ▁Navy ▁ 1 9 4 4 – 4 7 . ▁After ▁being ▁dem obil ised ▁in ▁ 1 9 4 7 ▁he ▁studied ▁at ▁University ▁College , ▁Card iff , ▁and ▁gained ▁a ▁first - class ▁degree ▁in ▁min eral ogy ▁and ▁pet ro log y . ▁He ▁then ▁did ▁post - grad uate ▁research ▁at ▁St ▁C ath ar ine ' s ▁College , ▁Cambridge , ▁and ▁gained ▁a ▁di pl oma ▁in ▁ge och em istry ▁from ▁Imperial ▁College ▁London . ▁He ▁joined ▁the ▁Col onial ▁Ge ological ▁Survey ▁Service ▁in ▁ 1 9 5 2 ▁and ▁was ▁sent ▁to ▁the ▁then ▁British ▁Som al il and ; ▁he ▁published ▁several ▁papers ▁on ▁the ▁ge ology ▁of ▁the ▁area . ▁In ▁ 1 9 5 6 ▁he ▁was ▁second ed ▁to ▁the ▁Som ali ▁political ▁service ▁as ▁a ▁district ▁officer ▁and ▁then ▁in ▁ 1 9 5 7 ▁to ▁the ▁Og aden ▁region ▁of ▁Eth iop ia ▁as ▁a ▁l ia ison ▁officer . ▁In ▁ 1 9 6 0