The part of the network that will be most affected by these necessary changes is the Low Voltage (LV) network that supplies homes and businesses. To complicate matters, the LV network is also the part of the network which there is the least information about, or knowledge of the ‘headroom’ available to accommodate a low carbon future. We do not accurately understand the impact of low-carbon initiatives on the LV network, and have little insight into the supply performance of the LV network against the European power quality standard EN50160. Therefore, there is not a clear picture of how best to design or manage the network to meet these challenges. Nor can NG be informed of how much LV microgeneration is running in GB. Having knowledge of this microgeneration would optimise the UK’s spinning reserve.