▁she ▁had ▁la ud ed ▁go ose ▁fat ▁as ▁being ▁an ▁essential ▁ing red ient ▁for ▁Christmas , ▁sales ▁of ▁the ▁product ▁increased ▁significantly ▁in ▁the ▁UK . ▁Wait rose ▁and ▁T es co ▁both ▁stated ▁that ▁go ose ▁fat ▁sales ▁had ▁more ▁than ▁double d , ▁as ▁well ▁as ▁As da ' s ▁increasing ▁by ▁ 6 5 % ▁from ▁the ▁previous ▁week . ▁Similarly , ▁after ▁she ▁ad vised ▁using ▁pr unes ▁in ▁a ▁reci pe ▁on ▁N ig ella ' s ▁Christmas ▁K itchen , ▁Wait rose ▁had ▁increased ▁sales ▁of ▁ 3 0 % ▁year ▁on ▁year . ▁▁ 2 0 0 7 – 2 0 0 9 : ▁N ig ella ▁Express ▁and ▁N ig ella ' s ▁Christmas ▁N ig ella ' s ▁Christmas ▁K itchen ▁led ▁to ▁the ▁commission ing ▁of ▁a ▁ 1 3 - part ▁cook ery ▁series ▁entitled ▁N ig ella ▁Express . ▁She ▁said ▁" I ▁wouldn ' t ▁describe ▁them ▁as ▁j unk ". ▁The ▁show ▁became ▁another ▁ratings ▁success ▁and ▁one ▁of ▁BBC ▁Two ' s ▁top - r ated ▁shows ▁each ▁week . ▁The ▁first ▁episode ▁deb uted ▁with ▁ 2 . 8 5   mill ion ▁view ers , ▁a ▁high ▁percentage ▁above ▁the ▁channel ' s ▁slot ▁average . ▁The ▁second ▁episode ' s ▁view ing ▁figures ▁rose ▁to ▁ 3 . 3   mill ion , ▁and ▁the ▁series ▁pe aked ▁at ▁ 3 . 4   mill ion ▁on ▁ 2 2 ▁October ▁ 2