1. Hinson S. Adcock A.:DEBATE PACK UK hydrogen economy. (2020)
2. Khullar Relph N.:What do we do with too much renewable energy?https://www.sierraclub.org/sierra/what‐do‐we‐do‐too‐much‐renewable‐energyaccessed July 2021
3. Dixon T.:Latest energy news and insight | Imbalance prices turn negative for six straight hours.https://www.cornwall‐insight.com/newsroom/all‐news/imbalance‐prices‐turn‐negative‐for‐six‐straight‐hoursaccessed July 2021
4. Watt‐Logic:Negative electricity prices hit the GB market ‐ Watt‐Logic.http://watt‐logic.com/2020/01/10/negative‐electricity‐prices/accessed July 2021
5. BMRS:System sell & system buy prices.https://www.bmreports.com/bmrs/?q=balancing/systemsellbuyprices/historicaccessed October 2021