I love electricity pylons; I find their abstract, gaunt shapes endlessly fascinating. Here we see a line of them marching across the landscape i by the Thames at Kennington, south of Oxford, at sunrise. But what are the mysterious shiny black bags Unfortunately, they are not giant alien droppings. They actually contain bale silage for feeding livestock; first take your conventional roll of hay, wrap in plastic and leave to ferment into yummy silage for farm animals.