▁then ▁become ▁First ▁Minister , ▁about ▁an ▁" empty " ▁farm ▁shed ▁that ▁was ▁" be ing ▁he ated ▁for ▁the ▁subs id y ". ▁The ▁scheme ▁did ▁not ▁take ▁into ▁account ▁that ▁properties ▁that ▁were ▁not ▁previously ▁he ated ▁could ▁now ▁be ▁he ated ▁for ▁a ▁profit . ▁ ▁The ▁lack ▁of ▁cost ▁control ▁led ▁to ▁the ▁Northern ▁Ireland ▁Executive ▁comm itting ▁a ▁figure ▁of ▁£ 4 9 0 m , ▁based ▁on ▁the ▁N IA O ▁report ▁ 2 0 1 5 / 1 6 , ▁to ▁the ▁scheme ▁over ▁ 2 0 ▁years . ▁H M ▁Tre as ury ▁contact ed ▁the ▁Executive ▁in ▁light ▁of ▁the ▁huge ▁bill ▁and ▁said ▁that ▁the ▁Executive ▁would ▁have ▁to ▁find ▁the ▁funds ▁for ▁it . ▁The ▁project ed ▁£ 4 9 0 m ▁spend ▁would ▁be ▁spread ▁over ▁ 2 0 ▁years , ▁as ▁the ▁participants ▁of ▁the ▁scheme ▁signed ▁contract s ▁with ▁D ET I ▁and ▁their ▁pay ments ▁were ▁to ▁last ▁for ▁ 2 0 ▁years . ▁When ▁news ▁first ▁broke ▁of ▁the ▁bot ched ▁scheme , ▁it ▁was ▁originally ▁thought ▁that ▁the ▁total ▁cost ▁to ▁the ▁budget ▁would ▁be ▁£ 4 0 0 m , ▁but ▁this ▁was ▁later ▁re vised ▁up ▁to ▁£ 4 9 0 m . ▁Northern ▁Ireland ▁receives ▁a ▁block ▁payment ▁each ▁year ▁from ▁H M ▁Tre as ury , ▁and ▁the ▁block ▁payment ▁will ▁need ▁to ▁be ▁adjust ed ▁as ▁a ▁result ▁of ▁the ▁money ▁committed ▁to ▁the ▁scheme . ▁ ▁Ar l ene