Habitat Networks (England)
What it is
Habitat Networks (England) is Natural England's mapping of ecological connectivity — where habitats of a given type sit close enough, and are linked enough, to function as a network rather than isolated fragments. It models core habitat patches plus the surrounding zones through which species can realistically move between them.
It is fundamentally an opportunity and connectivity layer, not a what's-here inventory: its value is in showing relationships between habitats, not in confirming the habitat of any single parcel.
How it's produced
Modelled from underlying habitat data using a generalised fixed-distance buffer around habitat patches — 500 m by default, 1 km for Blanket Bog — with overlapping buffers merged to form the network, per Natural England's Habitat Network Mapping Guidance (NERR081). That buffer distance was set once, via a literature review of dispersal-distance and landscape-permeability evidence, then applied uniformly; it is a fixed rule, not a dynamic per-patch, per-species cost-surface model. Because it is derived from other datasets and this modelling assumption, its confidence inherits the limits of its inputs and the chosen buffer parameters.
Update frequency & currency
Refreshed periodically as the underlying habitat data and methodology are updated.
Spatial resolution / precision
Network-model resolution — appropriate for strategic connectivity questions, not for parcel-level habitat confirmation.
Known limitations
- A model of relationships, not a record of habitat. It tells you about connectivity, not what is definitely present on a given parcel.
- Parameter-dependent. Network extents shift with the fixed buffer distance chosen (500 m generally, 1 km for Blanket Bog) — not a per-patch, per-species model.
- Derived confidence. Only as reliable as the habitat layers beneath it.
Role in BNG assessment
Strategic context and opportunity-finding, not a habitat-parcel source. Habitat Networks help answer where off-site gains would strengthen an existing network — directly relevant to strategic significance and to siting off-site gains well. It complements, and increasingly overlaps with, the opportunity mapping in the LNRS Local Habitat Maps.
Habitat Networks is a "where should we act?" dataset, and it's most powerful when you stop reading it as "what's here?". A well-placed off-site gain that plugs a gap in an existing network delivers far more ecological value than the same units dropped in isolation — and this layer is one of the few open tools that makes that visible. Its weakness is the flip side of its strength: it's a model of models, so its edges move with its assumptions. Use it to prioritise and connect, cross-check siting against the local LNRS, and never quote it as evidence that a specific parcel holds a specific habitat.
Official source
Last reviewed
5 July 2026. Revisit if Natural England updates the network methodology or the underlying habitat inputs.