A week after my first walk, I was out again. It was a grey day, like almost every day since this interminable winter began. The light seemed pretty good for photography though, with no harsh overhead sun. My vague plan was to walk as far as Erith. When I walked this section with Jo back in summer 2010, the weather was baking hot. The fairly lengthy detour around the River Darent and Dartford Marshes was hard work given we had no water with us and there was zero shade along th