a.Development Pressure (e.g. encroachment, adaptation, agriculture, mining)

St Kilda is not deemed under any development threat. The MoD Base was already underway when the property was acquired by NTS and the NNR declared by the Nature Conservancy (the government grant-in-aid body that is now Scottish Natural Heritage). Since then the development of the Base and its facilities has been subject to rigorous scrutiny and control in keeping with the international status of the property. Co-operation between MoD, NTS and SNH has been excellent, manifested in a regular tri-partite annual meeting to discuss management. An Annual Operational Plan will be agreed between NTS, SNH, HS and MoD/QinetiQ which will be discussed and agreed annually to be implemented with regular liaison at a local level. Local SNH staff and NTS staff from the mainland liaise with the Range staff on a routine basis.

Developments on St Kilda are carefully controlled by The National Trust for Scotland and by the statutory agencies. Almost all development relates to the use of the MoD Base (which largely lies outwith the scheduled area). Apart from a long-term strategy of providing protective cladding to the ageing buildings on the Base, no new developments of any significance are being proposed. Beyond the Base, the restoration programme for historic structures has now been completed, and the only additional building which may be considered for reconstruction in the near future would be a blackhouse adjacent to House 6, which would become part of the interpretative reconstruction of an early 20th-century domestic unit. There are no foreseeable changes to the current land-use beyond the base: no agricultural or other organised activity occurs on any of the islands other than that associated with the artillery-tracking facility.

Cleitean above the head dyke

Archaeological deposits on the islands are arguably under pressure from the work of archaeological researchers. This work is, however, very closely monitored, and invasive research is only permitted following scrutiny by the St Kilda Archaeological Research Committee, and with the appropriate consents from Historic Scotland, Scottish Natural Heritage, Scottish Environment Protection Agency and The National Trust for Scotland.