Clare Balding meets those who have found love and companionship through walking when she joins a group to walk a section of the Greensand Way in Surrey.

She speaks to Liz and James who explain how walking side-by-side took the awkwardness out of their first meeting. Liz said she knew James liked her when he started flirting like a teenager over lunch, even though she was wearing her Mum's over-sized waterproof at the time.

Margaret explains how walking transformed her retirement and led to a wider range of social activities. She adds, "London can be very lonely when you live on your own".

Clare hears how walk-leader Roger met his wife Sue thirty years ago on a walk, and that this history can provide a map of a relationship both literally and metaphorically. Although they walk at a different pace, Sue's keen to point out that Roger never forgets she's on the walk.

Producer: Toby Field.