On an unusually hot May day in Aberdeenshire, Edwin Third stands on the bank of the River Muick, a tributary of the UK’s highest river, the Dee, talking us through the rising threats to one of Scotland’s most celebrated species, the Atlantic salmon. Against the hills of the Cairngorms national park, a herd of stags on the moorland bask in the sun.

It is a spectacular landscape, attracting hikers, mountain-bikers and salmon fishers, the latter contributing an estimated £15m to Aberdeenshire’s economy.

But according to Third, the river operations manager for the Dee District Salmon Fishery Board and River Dee Trust, the changing climate threatens the survival of spring salmon in the Dee’s Special Area of Conservation, a place where King Charles learned to fly-fish.