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History of Cornwall Insight from small beginnings to global presence

20

2005

  • Cornwall Insight is established and named after its founder Nigel Cornwall. Launched with three employees and based in a holiday cottage in the Norfolk countryside
  • The first retail energy market share survey is released and the first Energy supplier forum is held
  • Flagship publications Energy Spectrum and the Daily Bulletin are launched

2006

  • Launched the training and market intelligence areas of the business

2008

  • Created a service offering in the renewables market

2010

  • First office opened in central Norwich

2013

  • Office moves to Millennium Plain, Norwich, due to team growth
  • Began a long-term energy cost service offering

2014

  • The company is bought into full staff ownership
  • The consultancy team is formed
  • Received the EDP’s Future 50 award

2016

  • First insight paper released
  • A dedicated innovation hub is created
  • Cornwall Energy rebranded to Cornwall Insight

2017

  • Gareth Miller made CEO
  • Secured backing from private equity firm BGF
  • Volker Beckers joins the board

2018

  • Energy 2030 launched
  • Over 50 full-time people employed in GB
  • Cornwall Insight Ireland is established
  • Office moves to the Union Building, Norwich, due to team growth

2019

  • Awarded the Financial Times UK’s Leading Management Consultants 2019
  • Cornwall Insight Australia is established
  • Received the Knowledge Pioneer award at the Norfolk Business Awards
  • Over 75 full-time people employed in GB, Ireland and Australia

2020

  • Awarded the Financial Times UK’s Leading Management Consultants 2020
  • Fully virtual learning and development programme launched

2021

  • Awarded the Financial Times UK’s Leading Management Consultants 2021
  • Awarded a Silver accreditation for Investors in People
  • Received the Business of the Year and Employer of the Year awards at the Norfolk Business Awards 2021

2022

  • Over 100 full-time people employed in GB, Ireland and Australia
  • Bowmark Capital, the private equity investor, backs the buy-out of Cornwall Insight
  • Received the Outstanding Achievement award at the Norfolk Business Awards 2022

2023

  • Awarded the Financial Times UK’s Leading Management Consultants 2023
  • Launched our new customer portal, CATALYST, exclusive for Cornwall Insight subscription customers

Cornwall Insight was commissioned by Zenobe Energy to undertake network charging analysis. Zenobe design, finance, build and operate battery solutions, and is on track to manage 1GW of grid-connected battery power by 2025.

The last decade has seen considerable amounts of battery storage connecting to the grid, with over 1GW clearing at the last Capacity Market auction for delivery in 2025-26. However, network charging regulation has not responded to this development: the last substantial updates to the methodology took place in 2014. This means electricity storage is charged in the same way as gas and coal generation, taking only exports, and not imports, into account. The resulting high charges can be a significant part of the cost stack for grid-connected batteries, particularly for assets seeking to connect in some locations, most notably in Scotland.

Zenobe wanted to understand how amending the TNUoS approach for storage to reflect both imports and exports would affect other system users. They also wanted to explore whether there would be a net benefit of reducing TNUoS for storage in constrained areas of the network. In these areas, battery storage can absorb power at times of high generation to reduce network constraints, and then export back to the system at times of lower generation when network constraints are alleviated.

We undertook analysis on two industry code modifications Zenobe was considering proposing, both of which would seek to amend the calculation of TNUoS charges for battery storage assets. One modification proposed to reflect both imports and exports in transmission charges for storage. The other proposed to incentivise storage to locate in constrained areas by exempting assets in these regions from charges. We provided analysis of how Zenobe’s suggested changes would impact other generators, and of the extent to which battery storage in key locations could reduce constraint costs.

Our independent analysis helped make the case for change as it demonstrated that both modifications would have minimal impact on other generators, but potentially significant impacts on network constraint costs. On completion of our analysis, the modifications were submitted to the formal change process for the Connection and Use of System Code (CUSC) as CMP393 and CMP394, with our supporting analysis published alongside the modification proposals.

Robert Newton, Regulation and Public Affairs Associate at Zenobe commented: “Cornwall Insight created a focused paper in a tight timeframe, providing us with a clearer picture of the regulatory landscape around energy storage.”

N.B. Zenobe recently withdrew CMP394 and are proceeding only with CMP393. This is because they want to focus on addressing the defect in the methodology, rather than actively providing a locational signal for storage through network charges.


Shoosmiths is a law firm supporting clients across the UK and internationally. It was winner of Law Firm of the Year at the Legal Business Awards 2022.

Cornwall Insight developed a series of thought leadership reports with Shoosmiths, co-authoring three papers. The first paper, published in September 2021, focused on the consolidation in the domestic energy market, looking at the intense competition in the sector and assessing innovative business models.

The second paper, Unlocking net zero strategies for business, published in November 2021, explored the potential routes to decarbonisation that businesses have at their disposal to meet their targets and help countries meet their net zero targets. 

The third paper, Battery-as-a-service: an underexplored opportunity?, published in July 2022, focused on e-mobility, considering the merits and challenges of BaaS (battery-as-a-service) and whether it is a viable option for the UK, either supplementing ‘traditional’ charging infrastructure, or helping meet demand in specific conurbations. Shoosmiths also supported four sessions of Cornwall Insight’s Financing Net Zero online forum. Topics discussed in our webinars included merchant financing, battery storage revenues and the role of hydrogen in decarbonisation.    

I've attended a few different Cornwall courses and found all of them to be really informative and provide an objective and thorough overview of the market, whilst also diving into more detail on particularly relevant or topical subjects. The course trainers are extremely knowledgeable and happy to answer any questions. I look forward to attending more in the future.

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