Scotland, maintains Calum Maclean, is one of the best places in the world to go wild swimming. Its lochs, waterfalls, and coastline present a huge range places to swim or submerge yourself in cold water.

And the cold water has a magic of its own, and can be transformative, as the many advocates of its restorative powers will attest.

Matt and Pete discuss their own experiences of swimming in Scotland, and talk to Calum about what they should be doing better, and how he manages to crack the ice on a mountain loch and throw himself in.