There's a watery theme to this new series of Ramblings, as Clare Balding walks along rivers, lakes and streams. In this first programme we find her exploring part of the Thames estuary in Essex, with local enthusiast, Eileen Peck. Eileen's written a book of local walks around her village of Thundersley trying to encourage locals to enjoy walking in their own area, rather than feeling they have to travel further a field. Producer: Lucy Lunt.