Imperial College London

Phil Heptonstall

Faculty of Natural SciencesCentre for Environmental Policy

Research Fellow



+44 (0)20 7594 7309philip.heptonstall




401Weeks BuildingSouth Kensington Campus





I graduated in Economics from The University of Hull, followed by sixteen years as a business analyst and project manager in the London wholesale insurance markets - developing, implementing and supporting a range of business-critical transaction processing and financial systems. I completed an MSc in Environmental Technology (specialising in Energy Policy) at Imperial College in 2005, and now lead systematic reviews and rapid evidence assessments within the UK Energy Research Centre's Technology and Policy Assessment team.

The Technology and Policy Assessment team has been part of the UK Energy Research Centre since the centre was established in 2004 and is now in its fourth phase, which started in 2019. The remit of the Technology and Policy Assessment team is to address contentious issues in the energy policy arena using systematic reviews of the evidence, supplemented by primary research and wider stakeholder engagement where required.

During my time at Imperial, I also completed my PhD, which assessed the accuracy of electricity cost estimates and their role in policy making.

Key UKERC TPA project outputs (see 'Publications' page for details):

'What’s in a bill? How UK household electricity prices compare to other countries'

'The Costs and Impacts of Intermittency - 2016 update: A systematic review of the evidence on the costs and impacts of intermittent electricity generation technologies'

'Presenting the Future: An assessment of future costs estimation methodologies in the electricity generation sector'

'Great Expectations: The cost of offshore wind in UK waters - understanding the past and projecting the future'

'Investment in Electricity Generation: The role of costs, incentives and risks'

I also teach on the Environmental Technology MSc at Imperial.



Gambhir A, Green R, Grubb M, et al., 2021, How are future energy technology costs estimated? can we do better?, International Review of Environmental and Resource Economics, Vol:15, ISSN:1932-1465, Pages:1-48

Heptonstall P, Gross R, 2020, A systematic review of the costs and impacts of integrating variable renewables into power grids, Nature Energy, Vol:6, ISSN:2058-7546, Pages:72-83

Parrish B, Heptonstall P, Gross R, et al., 2020, A systematic review of motivations, enablers and barriers for consumer engagement with residential demand response, Energy Policy, Vol:138, ISSN:0301-4215, Pages:1-11

Gardiner D, Schmidt O, Heptonstall P, et al., 2020, Quantifying the impact of policy on the investment case for residential electricity storage in the UK, Journal of Energy Storage, Vol:27, ISSN:2352-152X

Parrish B, Gross R, Heptonstall P, 2019, On demand: Can demand response live up to expectations in managing electricity systems?, Energy Research and Social Science, Vol:51, ISSN:2214-6296, Pages:107-118

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