The Mymms Solar Farm

Welcome to our consultation website 

Qualitas Energy is working with Gascoyne Estates to bring forward plans for The Mymms Solar Farm on land north and south of Cecil Road, South Mimms, Potters Bar, EN6 3NT.

The proposed 60MW solar farm reflects a combination of Qualitas Energy’s energy expertise with Gascoyne Estates long-term approach to land management, creating a development that advances clean energy, community engagement and benefit, and long-term care for the countryside.

The project remains at an early stage, with environmental assessments, technical surveys and ongoing evidence gathering continuing to help inform the design and evolution of the proposals.

About Us

A Commitment to Local Engagement

Since July 2025, Gascoyne Estates has undertaken a series of community engagement events considering renewable energy development. This began with an Infrastructure Charrette in July 2025, which sought to understand the key issues of landscape, food security and community impact. This was followed by an event held in September 2025 to discuss Gascoyne’s landholdings in detail. Finally, a public drop-in event to discuss the results of a landscape appraisal assessment was held in February 2026. These discussions brought together residents, tenant farmers, community representatives, environmental organisations, technical experts and political stakeholders to explore how renewable energy infrastructure could be delivered responsibly, in the right place and in a way that reflects the character of the local landscape and community.

Importantly, these conversations took place before any formal proposals were developed. Rather than presenting a predetermined scheme, the process sought to understand local priorities and concerns from the outset. Key themes raised included protecting landscape character, respecting heritage assets and valued views, maintaining mature hedgerows and ecological features, minimising visual intrusion, safeguarding agricultural livelihoods, and ensuring future proposals deliver meaningful local benefit.

The emerging proposals for The Mymms Solar Farm have been informed by that engagement process. The scheme has evolved through feasibility studies and landscape assessments, with an emphasis on landscape-led design and ensuring the proposals respond sensitively to their surroundings.

Proposed Development

The Mymms Solar Farm is being proposed on land north and south of Cecil Road, South Mimms, Potters Bar, EN6 3NT.

The Proposed Development comprises a solar farm and associated infrastructure. The red line planning application boundary extends to approximately 122 hectares, comprising the main development area for the proposed solar arrays and associated infrastructure.

The Mymms Solar Farm would include ground-mounted solar photovoltaic (PV) panels, inverter and transformer stations, a substation, internal access tracks, security fencing, CCTV and areas of landscaping and biodiversity enhancement. The solar arrays would be mounted on fixed metal frames with associated infrastructure distributed across the site.

Electricity generated by the solar farm would be exported to the National Grid via underground cabling connecting the site to a point of connection approximately 2.4km from the solar farm. The indicative underground cable route would broadly follow existing highway corridors.

Access to the site during construction and operation is currently anticipated to be taken from Cecil Road, with a number of potential access points continuing to be assessed as the design evolves. The proposals will also incorporate landscape mitigation, ecological enhancement and biodiversity net gain measures alongside the operational infrastructure.

Environmental Impact Assessment (EIA) Screening Request

We recently submitted an Environmental Impact Assessment (EIA) Screening Request to Hertsmere Borough Council. This represents an early stage in the planning and environmental assessment process. The request is currently being validated by the Council and, once validated, will be available on the Council’s planning portal and accessible via this website.

The submission of the EIA Screening Request does not represent a finalised proposal. Rather, it forms part of an ongoing process of evidence gathering, technical assessment and environmental surveying which will continue to inform the evolution of the scheme. The EIA process will help identify the environmental topics requiring detailed assessment, understand any potential impacts, and inform measures to avoid, reduce and mitigate effects wherever possible, while also identifying opportunities for environmental enhancement. 

The final extent of panel coverage remains subject to the findings of ongoing surveys and technical assessments. The layout submitted as part of the EIA Screening Request represents the most impactful scenario for the purposes of EIA screening, and it is anticipated that the extent of panel coverage will reduce as the design evolves.

Download early indication of site arrangement here, noting the likely extent of panels will reduce.

Indicative Timeline


EIA Screening Submitted to Hertsmere Borough Council

Late May 2026


May - June 2026

Consultation Period


September 2026

Planning Application Submission

Consultation Event at South Mimms Village Hall

19th June 2026