 It was formerly a mutual organisation owned by its members and operating "...like a co-operative, using the collective buying power of the large group of members to negotiate deals with suppliers".Nisa's headquarters and one of its ambient distribution centres are co-located in Scunthorpe, North Lincolnshire.It also has distribution centres for temperature controlled products at Stoke-on-Trent, Staffordshire; Harlow, Essex and Livingston, West Lothian.