led ▁and ▁appointed ▁version ▁of ▁the ▁Vel ox . ▁Following ▁G M ▁practice ▁from ▁America , ▁from ▁this ▁point ▁V aux hall ▁began ▁offering ▁annual ▁minor ▁updates , ▁improvements ▁and ▁sty ling ▁changes ▁to ▁its ▁cars ▁to ▁both ▁keep ▁up ▁with ▁compet itors ▁and ▁to ▁tempt ▁existing ▁own ers ▁to ▁replace ▁their ▁car . ▁ ▁Since ▁the ▁restart ing ▁of ▁car ▁production ▁in ▁ 1 9 4 5 ▁the ▁limit ing ▁factor ▁for ▁V aux hall ▁sales ▁had ▁been ▁production , ▁sometimes ▁leading ▁to ▁length y ▁waiting ▁lists ▁for ▁customers . ▁While ▁the ▁L ut on ▁factory ▁had ▁been ▁expanded ▁and ▁modern ised ▁in ▁the ▁early ▁ 1 9 5 0 s , ▁the ▁main ▁restriction ▁was ▁the ▁lack ▁of ▁capacity ▁for ▁building ▁the ▁unit ary ▁body sh ells . ▁Exp ansion ▁of ▁the ▁body ▁shop ▁would ▁require ▁large ▁invest ment ▁that ▁G M ▁was ▁rel uct ant ▁to ▁release ▁and ▁this ▁was ▁the ▁main ▁reason ▁for ▁V aux hall ▁re lying ▁on ▁a ▁single ▁body ▁design ▁across ▁three ▁distinct ▁models . ▁In ▁ 1 9 5 4 ▁G M ▁management ▁san ction ed ▁a ▁switch ▁to ▁a ▁two - body ▁line - up ▁at ▁V aux hall ▁with ▁concurrent ▁invest ment ▁to ▁expand ▁both ▁the ▁body ▁shop ▁and ▁production ▁lines ▁at ▁L ut on . ▁The ▁new ▁model ▁would ▁replace ▁the ▁four - cy l inder ▁Wy vern ▁with ▁a ▁smaller ▁car ▁using ▁the ▁same ▁engine , ▁bringing ▁V aux hall ▁into ▁line ▁with ▁the ▁established ▁norm ▁for ▁cars ▁in ▁the ▁