ite ▁teams , ▁who ▁were ▁sent ▁to ▁qu ell ▁the ▁ri ot . ▁John ▁Th orn hill , ▁the ▁president ▁of ▁the ▁independent ▁monitoring ▁board , ▁agreed ▁that ▁ins u fficient ▁staff ▁had ▁caused ▁rising ▁levels ▁of ▁violence ▁in ▁pr isons ▁in ▁England ▁and ▁Wales , ▁leading ▁to ▁" un rest rained ▁violence " ▁and ▁the ▁transfer ▁of ▁a ▁" large ▁number ▁of ▁prisoners ▁... ▁to ▁other ▁pr isons ▁that ▁are ▁already ▁stretch ed ▁with ▁their ▁own ▁problems ▁and ▁staff ing ▁issues ." ▁ ▁In ▁August ▁ 2 0 1 8 ▁its ▁contract ▁to ▁run ▁B irmingham ▁Pr ison ▁was ▁rev oked , ▁after ▁Peter ▁Clar ke , ▁the ▁Government ' s ▁Chief ▁Ins pect or ▁of ▁Pr isons ▁reported ▁that ▁it ▁was ▁the ▁worst ▁he ▁had ▁ever ▁visited . ▁ ▁Prof it ▁marg ins ▁Ben ▁Sau nd ers , ▁the ▁head ▁of ▁two ▁British ▁imm igr ant ▁cent ers ▁that ▁have ▁been ▁the ▁loc us ▁of ▁ab use ▁of ▁d eta ine es ▁was ▁put ▁on ▁leave ▁in ▁September ▁ 2 0 1 7 . ▁A ▁parliament ary ▁committee ▁chair ▁and ▁the ▁O pp osition ▁Labour ▁shadow ▁home ▁secretary ▁compla ined ▁that ▁G 4 S ' s ▁contract ▁with ▁the ▁Home ▁Office ▁limited ▁it ▁to ▁a ▁ 6 . 8 % ▁profit ▁on ▁operations , ▁but ▁instead ▁the ▁pre - tax ▁profit ▁marg ins ▁appear ▁to ▁have ▁r anged ▁between ▁ 2 0 % ▁to ▁ 3 0 %. ▁Sau nd ers ▁had ▁previously ▁directed ▁the ▁Med way ▁Sec ure ▁Training ▁Centre