In 2016, the Cornwall and Isles of Scilly Local Nature Partnership (CIoS LNP) and Cornwall Council launched the ‘Environmental Growth Strategy’. To support this, Cornwall Council created a draft 'Local Nature Recovery Strategy'. Part of this strategy explores reintroducing lost species. Cornwall Council commissioned the Derek Gow Consultancy to undertake a feasibility study into the reintroduction of six mammal species: beaver, pine marten, red squirrel, water vole, wild boar and wildcat. The report explores whether mammal reintroductions can help meet environmental and social goals, including habitat recovery, flood management, carbon capture and social well-being. It also aligns with one of Cornwall Council's key principles of “the right habitat in the right place”.

Scope
This report is the outcome of the feasibility study and provides a strong evidence base. This can support decision-makers considering reintroducing any of the six mammals. It is not an intention by Cornwall Council to reintroduce any of the species either wholly or as a contributing party. Nor is it a statement of intent on behalf of any other party.

Methods
The study used a variety of methods to assess the reintroduction process for each species. Species profiles used desk-based reviews of existing literature. They contain information about the mammal, their historical presence in Britain and Cornwall and the benefits they provide. They also give examples of previous reintroduction experience from Britain and Europe. Risk tables assess the level of risk posed to the species, the release environment and human interests. Scores are for the likelihood of the risk occurring and the consequence if they did occur. Each risk has suggested mitigation strategies.

Experts advised on health screening requirements and disease risk mitigation for each species. This is a guide and not a replacement for a full Disease Risk Analysis (DRA). The legislation and licensing considerations for a reintroduction are presented for each species. Desk-based assessments and expert knowledge and experience provides cost estimates for each phase of a reintroduction. Online surveys captured the public and stakeholder’s views and opinions regarding reintroductions. Stakeholders attended an in-person workshop to give views on management requirements of reintroductions, as well as to discuss principles of engagement for consultations. These views give context of the current level of support for each species. The findings are not a replacement for local engagement during reintroduction projects.

Expert modelling techniques created habitat availability maps for each species. For beavers and water voles the map shows the highest number of dams a waterbody 5 Information Classification: CONTROLLED could support. For the four other species maps show the woodland blocks available across Cornwall.