This document discusses how improving energy efficiency and increasing renewable energy generation can help address issues with the UK's energy system. It notes that while renewable capacity is growing, it only accounts for about a quarter of electricity generation currently. Improving building insulation and switching to more efficient lighting, heating, and cooling can significantly reduce energy consumption to better match intermittent renewable supplies. Combining different technologies like solar, efficient heat pumps, and combined heat and power can maximize the benefits and allow renewables to meet a larger share of electricity demand. A case study distribution center was used as an example to illustrate how a multi-technology approach could achieve major energy and carbon savings.