Large greenfield sites located close to designated habitats present both challenges and opportunities for biodiversity-led design. Our approach is to place botanical survey and UK Habitat Classification (UKHab) at the centre of ecological assessment, ensuring that development proposals are informed by a robust understanding of habitats, their condition and their wider ecological context.
Our work at Land at Foxhall Road, Ipswich, Suffolk demonstrates how detailed botanical evidence can underpin a comprehensive Ecological Impact Assessment (EcIA), inform a Habitats Regulations Assessment (HRA), and contribute to the Environmental Statement (ES) for a major residential-led scheme.
Background
The site at Foxhall Road extends to approximately 100 hectares, with a wider study area assessed to ensure baseline conditions were fully understood across the landholding and beyond.
The site is located within the 13 km Zone of Influence (ZoI) defined by the Suffolk Coast Recreational disturbance Avoidance and Mitigation Strategy (RAMS), with the Deben Estuary SPA/Ramsar located approximately 2.7 km away. A number of SSSIs of national importance also lie within 5 km, including Ipswich Heaths, part of which extends into the site itself, as well as Bixley Heath, Sinks Valley Kesgrave and Newbourn Springs SSSIs.
This context placed a strong emphasis on the need for accurate habitat mapping, botanical evaluation and impact assessment, particularly in relation to heathland habitats and functionally linked green infrastructure.
SES’s involvement
SES was commissioned by Bloor Homes Ltd. to undertake a suite of ecological surveys and prepare an EcIA to support an Outline Planning Application for residential development at Foxhall Road.
SES undertook detailed UK Habitat Classification (UKHab) surveys across the site and wider study area. These surveys provided a standardised, defensible baseline against which ecological value and potential impacts could be assessed.
The botanical surveys identified:
- Lowland heathland habitats of regional importance, including areas associated with Ipswich Heaths SSSI
- Woodland, grassland parcels, mature native trees and hedgerows of local importance within the site
- Wetland habitats associated with the Mill River to the south, considered to be of county to district importance
UKHab mapping allowed habitats to be assessed objectively in terms of their distinctiveness, extent and connectivity, and provided the evidence base for subsequent impact assessment, mitigation design and Biodiversity Net Gain (BNG) calculations.
Informing the environmental statement and ecological impact assessment
The botanical data collected through UKHab surveys fed directly into the ecological impact assessment and the wider environmental statement, allowing SES to clearly identify:
- Habitats at greatest risk from development
- Opportunities to avoid or minimise habitat loss through layout design
- Areas suitable for habitat retention, buffering and enhancement
This habitat-led approach ensured that proposals were designed to minimise losses to the most valuable botanical features, particularly lowland heathland and well-connected woodland and hedgerow networks.
Habitats regulations assessment (HRA)
Given the site’s proximity to multiple European and nationally designated sites, SES completed a Habitats Regulations Assessment to assess potential likely significant effects, both alone and in-combination.
Botanical and habitat considerations were central to the HRA, particularly in relation to:
- Recreational pressure on heathland and estuarine designated sites
- Urbanisation effects on sensitive habitats
- Potential water quality impacts arising from surface water runoff
Mitigation measures included the provision of on-site green infrastructure, payment of the Suffolk RAMS tariff, and additional site-specific measures to manage recreational pressure on Ipswich Heaths SSSI, secured through an SSSI Management Plan. Potential water quality effects were addressed through the site drainage strategy, ensuring downstream designated habitats were protected.
Long-term habitat enhancement and BNG
While some habitat loss was unavoidable, the assessment demonstrated that beneficial effects for habitats are predicted in the medium to long term. This is to be achieved through the site’s BNG and green infrastructure strategies, alongside targeted management proposals for the Martlesham Heath SSSI unit.
Botanical surveys also identified the presence of invasive non-native species, including Japanese knotweed and Spanish bluebell, which will be managed through a Habitat Management and Monitoring Plan (HMMP). This plan will act as the delivery mechanism for BNG and ensure long-term protection and enhancement of retained habitats.
Integrating botany with wider ecology
Although the site supports a wide range of protected and notable species, SES’s habitat-led approach ensured that botanical value and habitat structure underpinned mitigation and design for all species groups. By retaining and enhancing key habitats, benefits are delivered not only for plants, but also for birds, bats, invertebrates and other fauna in the longer term.
A strategic, evidence-led outcome
The Foxhall Road project illustrates the importance of high-quality botanical survey and UKHab mapping in shaping large-scale development proposals, particularly where sites are closely linked to designated habitats.
Through the integration of UKHab survey, EcIA, Habitats Regulations Assessment and the Environmental Statement, SES provided a clear, defensible ecological evidence base that enabled planning decisions to be made with confidence, balancing development needs with the protection and enhancement of Suffolk’s most valuable habitats.