Hampshire County Council BOAT No 745 Byway Open to All Traffic is an ancient sunken lane in the Hangers of East Hampshire, within The South Downs National Park. It is used by walkers, horse riders, cyclists, 4 x 4 drivers and motorcyclists, primarily for recreation. Very occasionally, it is used by someone who works on the land. I walk this track almost daily. On my walk I find and collect detritus left by other users. I also record damage done by the vehicles.
These images record an oil leak that drew a line along the chalk.
Liz Clifford 
I enjoy reading your posts and have a real sense of the interest you have in this space which you have come to know which makes compulsive reading.
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