, ▁middle ▁and ▁late . ▁ ▁Sea , ▁London ▁and ▁Past oral ▁Sym phon ies ▁( 1 9 1 0 – 1 9 2 2 ) ▁The ▁first ▁three ▁sym phon ies , ▁to ▁which ▁V aug han ▁Williams ▁assigned ▁titles ▁rather ▁than ▁numbers , ▁form ▁a ▁sub - group ▁within ▁the ▁nine , ▁having ▁program m atic ▁elements , ▁absent ▁from ▁the ▁later ▁six . ▁ ▁A ▁Sea ▁Sym phony ▁( 1 9 1 0 ), ▁the ▁only ▁one ▁of ▁the ▁series ▁to ▁include ▁a ▁part ▁for ▁full ▁cho ir , ▁diff ers ▁from ▁most ▁earlier ▁ch oral ▁sym phon ies ▁in ▁that ▁the ▁cho ir ▁s ings ▁in ▁all ▁the ▁movements . ▁The ▁extent ▁to ▁which ▁it ▁is ▁a ▁true ▁sym phony ▁has ▁been ▁deb ated ; ▁in ▁a ▁ 2 0 1 3 ▁study , ▁A lain ▁F rog ley ▁describes ▁it ▁as ▁a ▁hy brid ▁work , ▁with ▁elements ▁of ▁sym phony , ▁or atorio ▁and ▁cant ata . ▁Its ▁she er ▁length — about ▁eight y ▁minutes — was ▁un pre ced ented ▁for ▁an ▁English ▁sym ph onic ▁work , ▁and ▁within ▁its ▁thoroughly ▁t onal ▁construction ▁it ▁contains ▁harm onic ▁dis son ances ▁that ▁pre - echo ▁the ▁early ▁works ▁of ▁Stra vin sky ▁which ▁were ▁soon ▁to ▁follow . ▁ ▁A ▁London ▁Sym phony ▁( 1 9 1 1 – 1 9 1 3 ) ▁which ▁the ▁composer ▁later ▁observed ▁might ▁more ▁accur ately ▁be ▁called ▁a ▁" sym phony ▁by ▁a ▁London er ",