The new National Control Centre for the Electricity Supply Board (ESB), Ireland, currently undergoing site commissioning, will be in operation in September 1986. The Control Centre will control a single 2200 MW island network. The control centre is being supplied under a supply contract with Landis & Gyr, Zug, Switzerland. There is a high degree of customer participation and emphasis is laid on customer interfacing. The central hardware comprises a dual main 32-bit computer system with Virtual Memory Operating System, four dual front-end processors and four display processors. Remote Terminal Units communicate with the Control Centre on a private communication network, mostly Microwave and Power Line Carrier. This paper describes the control centre in a general way with emphasis on contractual arrangements, customer involvement and testing procedures.