end ians , ▁and ▁are ▁entitled ▁to ▁join ▁the ▁Old ▁South end ian ▁Association ▁( OS A ) ▁of ▁past ▁members ▁and ▁al umn i , ▁to ▁keep ▁in ▁touch ▁and ▁network ▁with ▁other ▁former ▁pup ils ▁at ▁social , ▁sport ing , ▁and ▁musical ▁events , ▁and ▁on ▁tri ps ▁and ▁me als . ▁The ▁OS A ▁has ▁the ▁mot to ▁" s ust aining ▁friend ships ", ▁and ▁is ▁one ▁of ▁the ▁oldest ▁and ▁largest ▁Boys ▁Associ ations ▁in ▁the ▁country , ▁with ▁ 2 , 4 7 0 ▁members ▁as ▁of ▁October ▁ 2 0 1 1 . ▁The ▁school ▁also ▁has ▁a ▁Par ents ' ▁Association ▁( PA ), ▁which ▁is ▁a ▁registered ▁char ity , ▁and ▁associated ▁PA ▁Committee . ▁ ▁History ▁The ▁school ▁was ▁founded ▁in ▁ 1 8 9 5 ▁on ▁a ▁site ▁in ▁Victoria ▁Circ us , ▁and ▁provided ▁the ▁first ▁secondary ▁education ▁within ▁the ▁Bor ough ▁of ▁South end - on - Se a . ▁It ▁moved ▁to ▁its ▁present ▁larger ▁site , ▁along ▁P ritt le well ▁Ch ase , ▁in ▁ 1 9 3 9 . ▁In ▁ 1 9 4 0 ▁the ▁school ▁was ▁ev acu ated ▁to ▁Mans field ▁in ▁Not ting ham shire ▁but ▁the ▁boys ▁returned ▁before ▁the ▁end ▁of ▁the ▁war . ▁Until ▁ 1 9 7 4 ▁it ▁was ▁admin ister ed ▁by ▁the ▁County ▁Bor ough ▁of ▁South end - on - Se a ▁Education ▁Committee , ▁then ▁Es sex ▁County ▁Council , ▁and ▁then