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National Grid's Great Grid Upgrade: Appointing Escrick Park Estate for Biodiversity Net Gain

National Grid's Great Grid Upgrade: Appointing Escrick Park Estate for Biodiversity Net Gain

National Grid partners North Yorkshire estate for habitat units

National Grid has appointed Escrick Park Estate to supply biodiversity net gain units for its Great Grid Upgrade programme. The arrangement links electricity infrastructure expansion with habitat restoration in North Yorkshire. Escrick Park is one of nine pilot sites selected to test BNG delivery in England.

The agreement reflects a practical shift in how major infrastructure projects meet environmental planning requirements. Instead of creating habitat on construction sites, developers can now purchase units from landowners who establish and manage ecological projects elsewhere. For National Grid, this provides a mechanism to satisfy biodiversity obligations while building transmission infrastructure across multiple sites.

This approach matters because the Great Grid Upgrade represents the largest overhaul of the UK electricity network in generations. The programme includes 17 major infrastructure projects across England and Wales. Each project requires planning consent, and each consent now carries mandatory biodiversity requirements under rules introduced in January 2024.

The Escrick Park arrangement shows how environmental policy is creating new commercial relationships between infrastructure operators and rural estates. It also demonstrates how BNG is moving from policy concept to operational delivery.

Great Grid Upgrade programme and investment scale

National Grid describes the Great Grid Upgrade as essential infrastructure for the UK's energy transition. The programme is designed to move more renewable electricity from generation sites to population centres. Consequently, it involves new overhead lines, substations, underground cables, and subsea connections.

The scale of investment is substantial. National Grid has committed £16 billion from 2021 to 2026 for UK energy transition projects. Industry sources indicate the wider transmission programme represents a much larger, longer-term capital plan spanning multiple decades.

This infrastructure expansion creates environmental obligations at every stage. Each new transmission line, substation, or cable route requires planning consent. Under current regulations, every consent must demonstrate a 10% biodiversity uplift. Therefore, National Grid needs access to biodiversity units across multiple project timelines and locations.

Off-site BNG delivery addresses this challenge. Rather than attempting habitat creation on or adjacent to every infrastructure site, National Grid can contract with estates like Escrick Park to provide units from dedicated ecological projects. This allows the company to meet planning conditions while maintaining project schedules.

Escrick Park Estate and pilot programme background

Escrick Park Estate near York has been involved in BNG pilot activity for several years. The estate was selected from 87 applications to test biodiversity net gain delivery. Selection criteria included BNG potential, natural capital benefits, and landscape connectivity.

The estate's pilot work spans approximately 230 hectares. This land sits adjacent to Skipwith Common National Nature Reserve, which covers 267 hectares. The proximity to an established nature reserve enhances ecological connectivity and provides baseline habitat for restoration planning.

Natural England included Escrick Park among nine pilot locations chosen to test BNG mechanisms before mandatory requirements took effect. The estate has used this pilot phase to establish ecological monitoring systems and baseline data. For example, pollinator-monitoring technology has been deployed to track insect populations before habitat creation begins.

The estate covers around 7,000 acres in total. However, the BNG pilot work focuses on specific parcels where habitat creation delivers measurable biodiversity units. This targeted approach allows the estate to generate units that meet the standardised metrics required under the BNG framework.

How biodiversity net gain works in practice

BNG became mandatory for most developments in England in January 2024. The policy requires developments to leave biodiversity in a measurably better state than before construction. Specifically, developers must achieve a 10% biodiversity uplift using standardised habitat metrics.

Projects must maintain this uplift for at least 30 years. This long-term commitment ensures habitat improvements persist beyond the construction phase. In addition, developers must follow a mitigation hierarchy: avoid harm first, then minimise impacts on-site, and only use off-site units as a last resort.

When on-site mitigation proves insufficient, developers can purchase biodiversity units from land managers who create and maintain habitat elsewhere. These units are calculated using the statutory biodiversity metric, which assigns values based on habitat type, condition, and strategic location. Units are sold through private agreements or through government-backed habitat banks.

This creates a commercial market for habitat creation. Landowners like Escrick Park Estate invest in ecological restoration, generate verified biodiversity units, and sell those units to developers who need them for planning consent. The system is designed to ensure that development delivers a net increase in habitat quality and extent across England.

Commercial implications for infrastructure and development

BNG requirements change project economics for infrastructure operators. Previously, environmental mitigation was often treated as a planning cost to be minimised. Now, biodiversity uplift is a mandatory deliverable with specific metrics and long-term commitments.

This has several practical consequences. First, developers must account for BNG costs in project budgets from the outset. Unit prices vary depending on habitat type and location, but early procurement reduces risk. Second, projects need access to units at the right time in the planning cycle. Delays in unit availability can hold up consent and construction schedules.

For National Grid, the solution is to establish relationships with multiple unit providers. Escrick Park represents one source of supply, but a programme spanning 17 major projects across England and Wales will require additional partnerships. The company needs unit availability aligned with its project pipeline and geographic footprint.

This creates opportunities for rural estates and landowners who can deliver verified habitat improvements. Estates with ecological expertise, available land, and proximity to development pressure can generate revenue from BNG units. However, they must commit to 30-year management obligations and meet monitoring requirements specified in the biodiversity metric.

The regulatory framework also affects public sector suppliers. Local authorities and housing associations must now demonstrate BNG compliance for their own projects. Many lack in-house ecological capacity, so they depend on external unit providers. Similarly, contractors bidding for public infrastructure work must show how they will satisfy biodiversity requirements, making access to unit suppliers commercially important.

Planning and environmental requirements for major projects

Large infrastructure projects face multiple layers of environmental regulation. National Grid's transmission programme requires Development Consent Orders for each major project. These consents include conditions on ecology, heritage, noise, visual impact, and community engagement.

BNG is now embedded in this consent process. Developers must submit biodiversity metric calculations showing how the project achieves the required 10% uplift. If on-site habitat creation cannot deliver the target, the application must demonstrate that off-site units are secured through legal agreements with verified providers.

This introduces delivery risk. If a unit provider fails to maintain habitat quality, the developer remains responsible for meeting the planning condition. Therefore, infrastructure operators need contractual protections and monitoring arrangements to ensure unit providers meet their 30-year obligations.

The regulatory landscape also affects project timelines. Environmental surveys, metric calculations, and unit procurement add stages to the planning process. However, early engagement with unit providers can reduce delays. Securing units before submitting a Development Consent Order application streamlines approval and reduces consent risk.

North Yorkshire context and landscape connectivity

The Escrick Park project sits within a landscape that includes Skipwith Common National Nature Reserve and surrounding agricultural land. This area provides ecological connectivity between the Vale of York and higher ground to the east. Habitat improvements on the estate can strengthen wildlife corridors and support species movement across the wider landscape.

Natural England's pilot programme specifically selected sites with landscape-scale potential. Escrick Park's proximity to an existing nature reserve enhances the biodiversity value of new habitat creation. Species using Skipwith Common can expand into restored habitats on adjacent estate land, increasing population resilience.

This regional context matters for unit valuation. The biodiversity metric assigns higher scores to habitat improvements in strategic locations. Projects that enhance ecological connectivity or support priority habitats generate more units per hectare. Therefore, Escrick Park's location increases the commercial value of its BNG delivery.

For North Yorkshire, the partnership brings long-term investment into ecological restoration. The 30-year commitment ensures habitat improvements persist beyond individual development cycles. This creates permanent ecological assets in the region and supports local biodiversity targets.

Essential information on the National Grid arrangement

What businesses should consider about BNG requirements

Companies planning developments in England now face mandatory biodiversity obligations. Understanding these requirements early in project planning reduces consent risk and avoids budget surprises. The 10% uplift applies to most developments, though exemptions exist for certain small-scale projects and permitted development rights.

Businesses should assess whether their projects can achieve the required uplift on-site. This depends on available space, existing habitat quality, and the nature of the development. On-site delivery is always preferred under the mitigation hierarchy, but many projects cannot create sufficient habitat within their footprint.

When off-site units are necessary, early procurement is important. Unit availability varies by region, and high-demand areas may face supply constraints. Securing units before submitting planning applications reduces delay risk and provides cost certainty. In addition, businesses should verify that unit providers have legal agreements in place and monitoring systems that satisfy regulatory requirements.

Public sector suppliers face additional considerations. Local authorities increasingly include BNG compliance in tender criteria. Companies bidding for public contracts should demonstrate how they will meet biodiversity requirements, either through on-site delivery or through partnerships with verified unit providers. This is particularly relevant for infrastructure, housing, and construction frameworks.

Businesses should also consider the wider regulatory direction. BNG sits alongside other environmental requirements including carbon reporting, energy efficiency standards, and supply chain due diligence. Companies with comprehensive environmental management systems find it easier to integrate BNG compliance into existing processes. Those without may need external support to establish monitoring, reporting, and procurement arrangements.

Finally, businesses operating across multiple sites should develop a portfolio approach to BNG. Establishing relationships with several unit providers reduces dependency on any single source. It also provides flexibility to match unit characteristics with specific project requirements, improving compliance outcomes and reducing regulatory risk.

Where to find detailed guidance and regulatory information

The Department for Environment, Food and Rural Affairs provides comprehensive guidance on biodiversity net gain requirements, including the statutory biodiversity metric and legal obligations for developers. Natural England publishes technical resources on habitat condition assessment, monitoring protocols, and approved methods for calculating biodiversity units.

National Grid's corporate website includes information on the Great Grid Upgrade programme, project timelines, and environmental commitments. The company publishes consultation materials and planning documents for individual transmission projects, which provide detail on specific Development Consent Order applications.

The Planning Inspectorate handles Development Consent Orders for nationally significant infrastructure projects. Their website includes guidance on the application process, environmental impact assessment requirements, and how biodiversity net gain is assessed during examination. Businesses planning major infrastructure projects can access case-specific advice through the Inspectorate's pre-application service.

For businesses seeking support with BNG compliance, carbon reporting, or sustainable procurement requirements, specialist advisory services can provide practical guidance on meeting regulatory obligations while managing costs and project timelines.

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