▁style ▁until ▁end ▁of ▁production . ▁Production ▁ended ▁in ▁ 1 9 7 3 , ▁by ▁when ▁ 9 , 0 9 9 ▁coup és ▁and ▁ 1 1 , 5 0 1 ▁sal o ons ▁had ▁been ▁built . ▁ ▁The ▁ 3 ½ ▁Lit re ▁sal oon ▁variant ▁was ▁a ▁favour ite ▁of ▁high - ran king ▁Government ▁Minister s , ▁and ▁served ▁as ▁Prime ▁Minister ial ▁transport ▁for ▁Harold ▁Wilson , ▁Edward ▁He ath , ▁James ▁Call ag han ▁and ▁Margaret ▁Th atch er . ▁As ▁test ament ▁to ▁their ▁suit ability , ▁the ▁last ▁batch ▁of ▁P 5 B s ▁to ▁roll ▁off ▁the ▁R over ▁line ▁in ▁June ▁ 1 9 7 3 ▁was ▁purchased ▁by ▁the ▁British ▁government ▁and ▁placed ▁in ▁storage , ▁to ▁be ▁released ▁for ▁government ▁use ▁as ▁required : ▁ ▁subsequently ▁registered ▁relatively ▁new ▁looking ▁P 5 s ▁were ▁therefore ▁still ▁familiar ▁s ights ▁in ▁West min ster ▁for ▁more ▁than ▁a ▁de cade ▁after ▁production ▁had ▁ended . ▁ ▁When ▁Margaret ▁Th atch er ▁entered ▁Down ing ▁Street ▁in ▁ 1 9 7 9 ▁after ▁her ▁election ▁victory , ▁she ▁was ▁driven ▁in ▁a ▁ 1 9 7 2 ▁model . ▁It ▁was ▁during ▁Th atch er ' s ▁eleven - year ▁ten ure ▁that ▁the ▁P 5 ▁was ▁eventually ▁ph ased ▁out ▁as ▁a ▁Prime - Min ister ial ▁car , ▁in ▁favour ▁of ▁the ▁J agu ar ▁X J . ▁ ▁Queen ▁Elizabeth ▁II ▁also ▁own s ▁an ▁Ar den ▁Green