

During autumn 2015, 20 pine martens were captured in Scotland, in areas where a healthy pine marten population occurs, under licence from Scottish Natural Heritage.

The Vincent Wildlife Trust (VWT) has begun a reinforcement of these mammals in the mid-Wales area. This was the first confirmation in Wales of the species, living or dead, since 1971. A male was found in 2012 as road kill near Newtown, Powys. Scat found in Cwm Rheidol forest in 2007 was confirmed by DNA testing to be from a pine marten. There is a small population of pine martens in Wales. In September 2022, the first pine marten to be seen in London in a century was spotted by the Zoological Society of London's wildlife cameras as part of a hedgehog monitoring program. In March 2018 the first ever footage of a pine marten in Northumberland was captured by the Back from the Brink pine marten project. In July 2017, footage of a live pine marten was captured by a camera trap in the North York Moors in Yorkshire. Sightings have continued in this area, and juveniles were recorded in 2019, indicating a breeding population. In July 2015, the first confirmed sighting of a pine marten in England for over a century was recorded by an amateur photographer in woodland in Shropshire. There have been numerous reported sightings of pine martens in Cumbria however, it was not until 2011 that concrete proof-some scat that was DNA-tested-was found, followed in October 2022 by images being captured of a pine marten in Grizedale Forest. Analysis of a scat found at Kidland Forest in Northumberland in June 2010 may represent either a recolonisation from Scotland, or a relict population that has escaped notice previously. In England, pine martens were long considered to be extinct. This may be due to ongoing persecution and trapping by local gamekeepers. Martens were reintroduced to the Glen Trool Forest in the early 1980s and only restricted spread has occurred from there. The expansion in the Galloway Forest has been limited compared with that in the core marten range. A study in 2012 found that martens have spread from their Scottish Highlands stronghold, north into Sutherland and Caithness and southeastwards from the Great Glen into Moray, Aberdeenshire, Perthshire, Tayside, and Stirlingshire, with some in the Central Belt, on the Kintyre and Cowal peninsulas and on Skye and Mull. In Great Britain, the species was for many years common only in northwestern Scotland. Pine marten at the British Wildlife Centre
