ber well ▁Gun ▁Brig ades ▁( 3 3 rd ▁Div is ional ▁Art illery ). ▁The ▁Brigade ▁vac ated ▁in ▁July ▁ 1 9 1 5 ▁and ▁the ▁bath s ▁then ▁were ▁used ▁for ▁tro op ▁accommod ation ▁and ▁hous ed ▁two ▁brig ades ▁of ▁the ▁Territ orial ▁Art illery ▁from ▁September ▁ 1 9 1 5 . ▁Public ▁sw imming ▁res umed ▁in ▁ 1 9 1 7 . ▁The ▁bath s ▁were ▁used ▁as ▁an ▁uno fficial ▁shelter ▁throughout ▁the ▁frequent ▁air ▁ra ids ▁of ▁ 1 9 1 7 ▁and ▁the ▁Council ▁installed ▁red ▁and ▁green ▁lights ▁to ▁show ▁" take ▁cover " ▁and ▁" all ▁clear " ▁in ▁addition ▁to ▁the ▁sir ens . ▁ ▁Inter - war ▁period ▁In ▁ 1 9 3 7 ▁two ▁r inks ▁for ▁ind oor ▁bow ling ▁were ▁introduced . ▁ ▁Play ers ▁were ▁charged ▁ 6 d ▁an ▁hour , ▁or ▁a ▁r ink ▁could ▁be ▁reserved ▁for ▁ 4 s ▁an ▁hour . ▁ ▁Second ▁World ▁War ▁ ▁War ▁prepar ations ▁in ▁ 1 9 3 8 – 3 9 ▁before ▁World ▁War ▁II ▁included ▁lay ing ▁flo ors ▁over ▁both ▁sw imming ▁po ols ▁for ▁use ▁as ▁First ▁A id ▁posts ▁and ▁medical ▁stores ▁and ▁equipment ▁were ▁brought ▁in . ▁ ▁The ▁fuel ▁short age ▁in ▁late ▁ 1 9 3 9 ▁led ▁to ▁the ▁pool ▁being ▁closed ▁over ▁winter . ▁In ▁ 1 9 4 0 ▁the ▁po ols ▁were ▁again ▁planned ▁to ▁close ▁for ▁the ▁winter ▁but ▁the