Pine Martens have been released at two sites in the Lake District in an effort to grow populations of the mustelid.

Eight females and five males were released into Grizedale Forest and the Rusland Valley in a project led by the University of Cumbria and the University of Leeds.

It is the first of two releases by the Pine Marten Recovery Project in a bid to boost numbers in their ancestral woodlands. The martens were moved under licence from populations in the Scottish Highlands.