My neighbours recently had a large horse chestnut removed. Sadly, although it looked reasonably healthy, it had honey fungus (one sign is that even though it has leaves on its lower branches, on its crown the very top twigs are bare). The tree surgeon said that there are quite a few chestnuts in the area which are infected - and there is a risk that a badly damaged tree (no fruit for a few years) will topple. That horse chestnut might have been one of the infected ones?

I will miss the gentle dappling of the sun through the leaves in the summer... but not at the expense of it crashing through my bedroom.