Question: What do you get when you go walking with the nature writer Robert Macfarlane and the actor and musician Johnny Flynn on a scorching hot summer's day in Wandlebury?

Answer: A Neolithic track, an Iron Age fort, a Roman road, a holm oak, cow pats, a mighty avenue of sun-dappled beech, a buzzard, a grasshopper orchestra, a dragonfly, the stories of a mysterious white horse and a dread augury and countless busy, buzzing bees. Oh, and no fewer than six extraordinary songs performed along the way.