▁or chestra ' s ▁jazz ▁wing . ▁The ▁various ▁sections ▁of ▁the ▁Radio ▁Orchestra , ▁prefix ed ▁A - D , ▁could ▁be ▁used ▁for ▁different ▁kinds ▁of ▁record ings ▁and ▁the ▁" C 1 " ▁section ▁of ▁the ▁BBC ▁Radio ▁Orchestra ▁was ▁known ▁as ▁the ▁BBC ▁Radio ▁Big ▁Band . ▁The ▁or chestra ▁was ▁initially ▁directed ▁by ▁Mal col m ▁Lock yer , ▁who ▁had ▁previously ▁directed ▁the ▁BBC ▁Show band ▁and ▁BBC ▁joined ▁by ▁various ▁arr angers ▁and ▁guest ▁conduct ors , ▁including ▁Barry ▁F org ie ▁in ▁ 1 9 7 7 , ▁who ▁remains ▁the ▁big ▁band ’ s ▁Musical ▁Director . ▁At ▁the ▁out set , ▁the ▁big ▁band ▁was ▁sometimes ▁known ▁within ▁the ▁BBC ▁as ▁the ▁' Radio ▁Dance ▁Orchestra ' ▁or ▁' Radio ▁Show band ', ▁util ising ▁some ▁of ▁ ▁the ▁names ▁the ▁band ▁had ▁been ▁previously ▁known ▁under , ▁but ▁it ▁was ▁officially ▁called ▁the ▁Radio ▁Big ▁Band ▁from ▁ 1 9 6 4 . ▁ ▁For ▁the ▁most ▁part , ▁it ▁has ▁been ▁a ▁standard - s ized ▁big ▁band , ▁compr ising ▁four ▁tr ump ets , ▁four ▁trom b ones , ▁five ▁sa x oph ones ▁( all ▁of ▁whom ▁double ▁on ▁various ▁re ed ▁and ▁wind ▁instruments ) ▁and ▁a ▁rh ythm ▁section ▁of ▁piano ▁( d ou bling ▁key boards ), ▁guitar , ▁double ▁bass ▁( d ou bling ▁bass ▁guitar ), ▁drums ▁and ▁per cussion ▁( including ▁v ib es ▁and ▁Latin ▁instruments ). ▁For ▁various ▁projects ,