Alan Horncastle

Managing Consultant

+44 (0) 1865 253 019

Location: Oxford

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Alan leads Oxera’s work on performance assessment and the water sector. He has provided strategic and detailed cost modelling advice for business planning purposes, on transactions, and during numerous price control reviews and Competition Commission cases. His advice has been provided at the executive board and senior management level, including expert oral advice at formal meetings with regulators, and hearings during Competition Commission inquiries. He has provided advice for companies and regulators in the energy, transport, water, financial services and communications sectors across Europe. Alan is currently writing A Practitioner's Guide to Stochastic Frontier Analysis with S. Kumbhakar and H.-J. Wang, due for publication in 2014.

Selected project experience

  • Advice to the water industry on total expenditure efficiency modelling (2013–14)

  • A review of the efficiency regime for a German gas transmission company (2013)

  • Advice on efficiency issues for an electricity DNO for RIIO-ED1 (2011–14)

  • Advice to BT on efficiency and incentives (2011–13)

  • Advice on efficiency issues for an energy transmission company for RIIO-T1 (2011–13)

  • Efficiency advice to Royal Mail, including internal benchmarking (1999–2014)

  • Efficiency advice to the Finnish energy industry (2012)

  • Developed a cost forecasting framework, including an international benchmarking study, for a top-ten international airport (2011–12)

  • Advised South Staffs Water on the impact of the merger with Cambridge Water on the comparative regime for the Competition Commission inquiry (2011–12)

  • Advice on efficiency issues for a Belgian energy distribution network (2011–12)

  • Strategic and regulatory efficiency advice to Network Rail in the context of ongoing sector reform and in preparation for the forthcoming price control (2011–12)

  • Advice on the efficiency regime for district heating in Europe (2011–12)

  • Advice to a UK gas distribution company on its Business Plan submission for the RIIO-GD1 regulatory review (2011–12)

  • Advice to a European Energy Regulator on alternative performance assessment approaches in electricity and gas networks (2010–12)

  • Advice on regulatory reform, including the efficiency regime, in Estonia (2010–12)

  • Advice on competition and regulatory reforms in the water industry (2010–11)

  • Examined consumption efficiency in the retail investment products market (2010)

  • Advice to major GB bus operators reviewing the likely impact of a change in the concessionary fares regime, including the efficient incremental costs (2010)

  • Efficiency advice for ESB for PR3 (2009–10)

  • Review of the GB rail industry’s demand forecasting framework (2008–10)

  • Strategic and efficiency advice in the bus, train and aviation sectors (2008–10)

  • Strategic, regulatory and efficiency advice for Thames Water for PR09 (2008–10)

  • Advised the boards, and legal and financial advisers, of water and energy companies on potential mergers and acquisitions (2001–13)

  • Input price inflation and indexation advice for LUL (2008)

  • Advised Ofwat on the implementation of new approaches to assessing expenditure, including the menu approach (2008)

  • Benchmarking of indirect and central Infraco costs for OPPPA (2007–08)

  • Assessments of Network Rail’s efficiencies for ORR, and ‘Recommendations on how to model efficiency for future price reviews’ (2003–09)

  • Advice to a bidder for the Midlands train operating franchise (2006–07)

  • Advised the BBC on the potential for efficiency improvements (2005–06)

  • Led Oxera’s efficiency advice for a number of price control reviews in energy, water, transport and communications (1996–2013)

  • Led Oxera’s efficiency advice for the Competition Commission inquiries of Manchester Airport (1997), British Gas Transco (1997), Mid Kent Water (2000), BAA (2002), a UK mobile phone operator (2002), Vivendi Water UK–Southern Water (2002), Mid Kent Water–South East Water (2007), Bristol Water (2010), and local bus services (2010) (1997–2010)


  • MSc Econometrics and Mathematical Economics, London School of Economics

  • BSc Economics, Analytical and Descriptive, London School of Economics