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The contribution of embedded generation to the connected capacity of the power system is increasing. In order to make best use of this resource, splitting the distribution network, also known as islanding, is being considered by some utilities. Operating the island in synchronism with the main network is preferred as this prevents out of phase reconnection of the island. This paper examines the technical challenges involved with emphasis on wide area telecommunications delay and time synchronization. The development of a phasor measurement and phase control system is shown and an experimental demonstration of a phase difference controller presented.