, ▁at ▁G ritt leton ▁House . ▁ ▁History ▁A ▁small , ▁independent ▁school , ▁founded ▁in ▁ 1 9 5 1 ▁by ▁Mrs ▁Jo anna ▁Sh ipp , ▁it ▁was ▁co - ed uc ational ▁at ▁both ▁primary ▁and ▁secondary ▁levels ▁and ▁also ▁a ▁children ' s ▁day care ▁provider . ▁▁ ▁The ▁school ▁was ▁non - den omin ational ▁and ▁non - select ive , ▁so ▁that ▁classes ▁were ▁made ▁up ▁of ▁pup ils ▁with ▁a ▁wide ▁range ▁of ▁ab ilities . ▁It ▁offered ▁pup ils ▁small ▁classes ▁and ▁claimed ▁to ▁teach ▁traditional ▁family ▁values , ▁cour tes y , ▁consideration ▁for ▁others , ▁and ▁responsibility . ▁ ▁In ▁ 2 0 0 8 , ▁the ▁average ▁class ▁size ▁was ▁ 1 5 , ▁and ▁the ▁school ▁fe es ▁for ▁day ▁pup ils ▁were ▁between ▁£ 4 , 6 2 0 ▁and ▁£ 7 , 4 5 5 . ▁ ▁The ▁school ▁closed ▁in ▁July ▁ 2 0 1 6 , ▁when ▁it ▁had ▁around ▁ 1 5 0 ▁children , ▁aged ▁between ▁two ▁and ▁six teen . ▁ ▁Notable ▁former ▁pup ils ▁ ▁Jam ie ▁C ull um ▁( born ▁ 1 9 7 9 ), ▁jazz - pop ▁singer - song writer ▁ ▁Emma ▁Pi erson ▁( born ▁ 1 9 8 1 ), ▁actress ▁ ▁Angel ica ▁M andy ▁( born ▁ 1 9 9 2 ), ▁actress , ▁best ▁known ▁for ▁her ▁role ▁as ▁Gab ri elle ▁Del ac our ▁in ▁the ▁film ▁Harry ▁Pot ter ▁and