Porton Down IPA
Location: East of the village of Porton, between the A338 and A30, north east of Salisbury in Wiltshire.
Grid Reference: SU 218 359
Porton Down is an extensive area of grassland, juniper scrub and broadleaved, mixed and coniferous woodland on the Wiltshire/Hampshire border.
Due to its continued military use, it has remained largely unchanged over recent decades.
It constitutes one of the largest uninterrupted tracts of semi-natural chalk grassland in Britain, a habitat which has declined by more than 80% in the last 50 years largely through agricultural intensification.
Populations of uncommon vascular plants, a diverse fungal flora and the largest population of juniper in Southern England can be found here.