le iter ▁for ▁the ▁United ▁Kingdom . ▁▁ ▁Prince ▁Hub ert us ▁was ▁an ▁accomplished ▁av i ator . ▁Ser ving ▁in ▁the ▁Luft wa ffe ▁as ▁a ▁cou rier ▁pilot ▁in ▁the ▁Eastern ▁Front , ▁Hub ert us ▁obtained ▁the ▁rank ▁of ▁Ober le ut nant ▁( sen ior ▁pilot ). ▁He ▁was ▁killed ▁in ▁action ▁when ▁his ▁plane ▁was ▁shot ▁down ▁by ▁the ▁Soviet ▁Air ▁Forces ▁on ▁ 2 6 ▁November ▁ 1 9 4 3 ▁in ▁Most y , ▁modern - day ▁Ukraine . ▁It ▁was ▁his ▁last ▁flight ▁before ▁he ▁was ▁to ▁be ▁re located . ▁News ▁of ▁his ▁death ▁spread ▁on ▁ 3 ▁December . ▁Hub ert us ▁was ▁buried ▁the ▁following ▁day ▁at ▁the ▁Cob urg ▁family ▁c emetery ▁at ▁C allen berg ▁Castle . ▁The ▁Duke ▁and ▁Duch ess ▁of ▁Sax e - C ob urg ▁and ▁Goth a ▁announced ▁the ▁death ▁of ▁their ▁son ▁and ▁he ir ▁in ▁Goth a er ▁Be ob ach ter ▁with ▁a ▁very ▁short ▁ob itu ary ▁on ▁ 1 1 ▁December . ▁The ▁du cal ▁couple ' s ▁young est ▁son , ▁Prince ▁Friedrich ▁Jos ias , ▁became ▁he ir ▁apparent ▁in ▁his ▁stead . ▁ ▁Princess ▁Sib yl la ▁was ▁dist ra ug ht ▁by ▁the ▁death ▁of ▁her ▁favour ite ▁brother . ▁In ▁ 1 9 4 6 , ▁she ▁had ▁a ▁son , ▁the ▁long - await ed ▁he ir ▁to ▁the ▁Swedish ▁throne , ▁and ▁named ▁him ▁Carl ▁Gust af ▁Fol ke ▁Hub ert us