Everything in me wanted to dislike it – but it’s lovely: BBC Radio 3’s Sound Walk reviewed

It’s a sweet, green, glowing dawn in north-west Scotland. All around us are empty hillsides of rock and heather. The cold air smells of moss. To the south, far mountain peaks resolve into high banks of mist and cloud, while up ahead stands the crumpled rock face of Ben Nevis, its broad shoulders beginning to fill the patchy, blueing sky as we walk towards it. It’s very beautiful. Look. A heron.

Why are we here? To take the long view, because two million years of intermittent glaciers have frozen, thawed and hewn the mountain into its present-day shape. More immediately, because of the Norwegian public service broadcaster. In the 2000s, it decided to televise, in real time, the railway journey from Bergen to Oslo. It’s a trip that lasts seven hours and features 182 tunnels, some of them extremely long. When it aired, the programme was watched by 20 per cent of the Norwegian population.