Chris Townsend embarks on a 700-mile walk along the spine of Scotl&, the line of high ground where fallen rain runs either west to the Atlantic or east to the North Sea. Walking before the Independence Referendum of 2014, & writing after the EU Referendum of 2016, he reflects on: nature & history, conservation & rewilding, land use & literature, & change in a time of limitless potential for both better & worse.