What once kept out hordes of bloodthirsty warriors is, nearly 2,000 years later, barely proof against the most timid of sheep. But if Hadrian’s Wall is now low on stature, it remains high on atmosphere, says Harry Pearson.
To look north-eastwards from Walltown Crags in Northumberland is to gaze upon an English wilderness. The ashen cliffs of the Whin Sill drop 75ft to a brindle-coloured plain that stretches far into the distance, its surface broken by patches of dark…
