jpennycook
According to a newspaper article, the Watercress Way is open to cyclists and pedestrians (and is longer than this): https://www.hampshirechronicle.co.uk/news/19829776.national-highways-clear-vegetation-stoke-road/
"existing walking and cycling route, The Watercress Way, which links Alresford, Kings Worthy, South Wonston and Sutton Scotney."