▁and ▁the ▁way ▁was ▁open ▁for ▁priv at isation . ▁▁▁▁ ▁When ▁British ▁Rail ▁was ▁sold ▁into ▁private ▁ownership , ▁the ▁Research ▁Division ▁( which ▁had ▁become ▁" BR ▁Research ▁Limited ") ▁was ▁bought ▁by ▁A E A ▁Technology ▁in ▁ 1 9 9 6 . ▁The ▁resulting ▁business , ▁" AE A ▁Technology ▁Rail ", ▁was ▁subsequently ▁sold ▁in ▁ 2 0 0 6 ▁to ▁a ▁vent ure ▁capital ▁company ▁and ▁became ▁D elta R ail ▁Group . ▁Trans mark , ▁the ▁consult ancy ▁arm , ▁was ▁sold ▁to ▁Hal c row ▁to ▁become ▁Hal c row ▁Trans mark . ▁ ▁A ▁somewhat ▁dated ▁display ▁of ▁material ▁rel ating ▁to ▁the ▁work ▁of ▁the ▁Division ▁was ▁maintained ▁in ▁the ▁Derby ▁Indust rial ▁Museum . ▁ ▁Leg acy ▁The ▁Research ▁Division ▁had ▁an ▁une asy ▁relationship ▁with ▁other ▁parts ▁of ▁BR , ▁and ▁like ▁most ▁of ▁the ▁products ▁of ▁Harold ▁Wilson ' s ▁" white ▁heat ▁of ▁technology " ▁speech , ▁were ▁killed ▁off ▁in ▁the ▁early ▁ 1 9 8 0 s . ▁The ▁basis ▁of ▁the ▁une ase ▁was ▁the ▁traditional ▁approach ▁of ▁most ▁of ▁BR ▁compared ▁with ▁theoretical ▁and ▁a eros pace ▁approaches ▁adopted ▁by ▁the ▁Research ▁Division . ▁The ▁h iring ▁of ▁gradu ates ▁rather ▁than ▁training ▁people ▁up ▁internally ▁also ▁caused ▁t ensions . ▁ ▁It ▁could ▁be ▁somewhat ▁tact less , ▁or ▁perhaps ▁na ive , ▁at ▁times . ▁The ▁A PT - E ▁was ▁provided ▁with ▁a ▁single ▁driver ▁position ▁central ▁in ▁the ▁cab , ▁at