100 year-old ash trees seen overlooking south London towards Westminster and the Houses of Parliament. Stretching into the distance, as we look northwards are the tall towers of the Palace of Westminster and Queen Elizabeth Towert (Big Ben) - the seats of power and government of the United Kingdom. It is autumn and leaves are falling from the ash trees in the foreground that a century old but now in jeopardy from ash dieback disease (Chalara fraxinea) which is currently claiming the lives of Britain's young and old ash trees.