Britain's horse chestnut trees are under attack from a "triple whammy" of pests, drought and disease, the organisers of the World Conker Championships warned yesterday.

Trees were being weakened by drought, under-mined by a disease called "horse chestnut bleeding canker" and attacked by a moth called the "horse chestnut leaf miner."

Scientists estimate 40,000 to 50,000 horse chestnut trees have been affected by "canker" while leaf miner moths have spread since first being found in Wimbledon four years ago. ..SUPL: