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Whomerley Wood Substation Extension

Vinters Avenue, Whomerley Wood, Stevenage

UK Power Networks (Operations) Limited is responsible for delivering electricity safely, efficiently, and reliably to 8.3 million homes and businesses across London, the South East and East of England.  For this purpose, the electricity regulator Ofgem has commissioned UK Power Networks to implement a trial facility for active network management called ‘Active Response’ using a ‘Soft Power Bridge’.

The purpose of a Soft Power Bridge is to enable electricity available from one section of the electricity grid to be transferred to another section.  This increases the flexibility of the electricity grid to respond to the highs and lows of demand during different parts of the day.  The Whomerley Wood Electricity Substation in Stevenage is the preferred site to conduct this trial within the entire network area covered by UK Power Networks.

​If successful, the Ofgem-sponsored trial will be rolled out across the UK, resulting in improved power supplies. 

UK Power Networks has been in consultation with Stevenage Borough Council (SBC) on the proposed plans and gave a presentation to the Council’s members in 2020, explaining the concept of Active Response solutions.

Learn more about the project: 

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The Need

A substation extension will be required to house the first High Voltage Power Electronic Device (PED) for regulating electricity...

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Planning Status

As part of the pre-application process, a number of design options prepared by Adrian Salt And Pang were presented to the SBC's Planning Committee...

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New Technology

By 2030 it is anticipated there will be up to 4.5 million electric vehicles in use across London, the East and South East of England...

Planned Growth in Stevenage Borough

Stevenage Borough Council’s “Future Town, Future Council agenda” plans for the provision of 7,500 homes and economic expansion of 14,000sqm of business and industrial space. 


Stevenage is part of the Innovations Corridor for the South East of England. It seeks to ensure that developments are energy efficient.  The proposed new technology will greatly help to achieve this objective.

This information has been prepared by Adrian Salt And Pang, Development Planning Consultants, town planning consultants and design advisors to UK Power Networks (Operations) Limited.

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