List of species occurring in Britain at a single location

The following is a list of native plant and animal species which are found in Britain, but only at a single location.

Key
Key to conservation designations for species:
 * RDB - Red Data Book with three subdivisions
 * (cr) - critically endangered
 * (en) - endangered
 * (vu) - vulnerable
 * W&CA 8 - Schedule 8 of the Wildlife and Countryside Act 1981

Key to conservation designations for sites:
 * NNR - national nature reserve
 * SSSI - Site of Special Scientific Interest

Vascular plants

 * This section currently lists non-critical species and critical species in the smaller apomictic genera; many microspecies in the apomictic genera Hieracium (hawkweeds), Rubus (brambles) and Taraxacum (dandelions) are also found at just a single site each.