one ▁per ▁a cre ), ▁but ▁this ▁was ▁based ▁on ▁limited ▁data ▁and ▁is ▁probably ▁an ▁over est imate . ▁A ▁more ▁recent ▁estimate ▁of ▁ 1 , 5 5 0 , 0 0 0 ▁in ▁Great ▁Britain ▁( Eng land ▁ 1 , 1 0 0 , 0 0 0 , ▁Scotland ▁ 3 1 0 , 0 0 0 , ▁Wales ▁ 1 4 0 , 0 0 0 ) ▁is ▁more ▁reliable , ▁but ▁still ▁has ▁a ▁high ▁degree ▁of ▁uncertainty ▁as ▁it ▁is ▁based ▁on ▁very ▁limited ▁information ▁about ▁h edge h og ▁density ▁estimates ▁for ▁different ▁habitat ▁types . ▁Given ▁this ▁figure , ▁and ▁more ▁firm ly ▁established ▁rates ▁of ▁decl ine , ▁it ▁is ▁now ▁thought ▁likely ▁that ▁there ▁are ▁fewer ▁than ▁a ▁million ▁h edge h ogs ▁in ▁Great ▁Britain . ▁ ▁Population ▁status ▁In ▁ 2 0 0 7 ▁the ▁h edge h og ▁was ▁class ified ▁a ▁B iod iversity ▁Action ▁Plan ▁‘ p riority ’ ▁species ▁in ▁Britain , ▁largely ▁in ▁response ▁to ▁negative ▁tr ends ▁identified ▁in ▁national ▁surve ys ▁such ▁as ▁M amm als ▁on ▁Ro ads ▁survey , ▁run ▁by ▁People ' s ▁Trust ▁for ▁End anger ed ▁Species ▁( PT ES ), ▁that ▁found ▁an ▁annual ▁decl ine ▁in ▁counts ▁of ▁road ▁cas ual ties ▁of ▁around ▁ 7 % ▁from ▁ 2 0 0 1 ▁to ▁ 2 0 0 4 . ▁Historic ▁data ▁from ▁the ▁National ▁Game bag ▁Census ▁suggest ▁a ▁steady ▁decl ine ▁between ▁ 1