▁motor ▁traffic . ▁ ▁To ▁the ▁north ▁is ▁C land on ▁Park , ▁a ▁ 1 0 0 0 ▁a cre ▁private ▁Gra de ▁II ▁List ed ▁agricult ural ▁park land ▁Est ate ▁that ▁is ▁the ▁Se at ▁of ▁the ▁current ▁Earl ▁of ▁On slow . ▁On ▁the ▁South ▁East ▁corner ▁of ▁C land on ▁Park ▁there ▁is ▁ 9 ▁acres ▁of ▁gard ens ▁& ▁grounds ▁where ▁ ▁C land on ▁House ▁is ▁located . ▁The ▁M ansion ▁House ▁with ▁ 7 ▁acres ▁of ▁gard ens ▁was ▁gift ed ▁to ▁the ▁Nation ▁by ▁the ▁On slow ▁family ▁and ▁is ▁now ▁a ▁National ▁Trust ▁property . ▁The ▁On slow s ▁provided ▁some ▁of ▁the ▁earliest ▁Spe akers ▁of ▁the ▁House ▁of ▁Commons , ▁such ▁as ▁Arthur ▁On slow ▁who ▁held ▁this ▁post ▁through ▁the ▁reign ▁of ▁George ▁II . ▁ ▁Mer row ▁remained ▁a ▁relatively ▁small ▁settlement ▁right ▁up ▁to ▁the ▁ 1 9 5 0 s , ▁when ▁the ▁Bush y ▁Hill ▁estate ▁was ▁built . ▁This ▁development ▁of ▁several ▁hundred ▁houses ▁was ▁originally ▁all ▁council - owned , ▁but ▁since ▁the ▁ 1 9 8 0 s , ▁many ▁have ▁passed ▁into ▁private ▁ownership . ▁ ▁Further ▁expansion ▁occurred ▁in ▁the ▁mid - 1 9 8 0 s . ▁In ▁the ▁green - field ▁site ▁border ed ▁by ▁Bur ph am , ▁the ▁Bush y ▁Hill ▁estate ▁and ▁C land on ▁Park , ▁the ▁Mer row ▁Park ▁development ▁was ▁built , ▁completely ▁surrounding ▁the ▁old ▁houses ▁on ▁Mer row ▁Street . ▁Com