Reply to Comment by Alison A. Monaghan, David A.C. Manning, and Zoe K. Shipton on ‘Repurposing Hydrocarbon Wells for Geothermal Use in the UK: The Onshore Fields with the Greatest Potential, by Watson et al. (2020)’

[1] state that ‘The cost of the [GGERFS] Observatory includes boreholes and compounds for research incorporating numerous sensors, a wide range of open data including environmental baseline boreholes and monitoring equipment, a contribution to IT infrastructure for open data etc.’ [2] made clear by citation of Watson and Westaway [11] that this potential ~8 kW estimate was for the sustainable thermal power output that might be achieved if particular GGERFS wells were to be used for groundwater production and reinjection, and was based on a simple calculation reported by [11]. Since similar simple calculations were applied to many other sites to create Figure 11, this was a fair comparison. Monaghan, A.A.; Starcher, V.; Dochartaigh, B.O.; Shorter, K.; Burkin, J. UK Geoenergy Observatories: Glasgow Geothermal Energy Research Field Site: Science Infrastructure Version 2; Open Report OR/19/032; British Geological Survey: Nottingham, UK, 2019; 49p, Available online: http://nora.nerc.ac.uk/id/eprint/522814/1/OR_19_032_GGERFS_Science_infrastructure_reportv11.pdf (accessed on 5 September 2020).