Courgette blossom end rot: the sequel

I think I’ve cracked it! As this picture demonstrates, I hope. Actually there were two courgettes of this size, but the other one has already been eaten (it went into a tomato sauce to accompany some spinach and ricotta tortellini). Since taking this photo, I’ve picked the remaining one and as I write, my other half is cooking a chilli con carne containing… chopped courgette. So in answer to the “what causes blossom end rot in courgettes?” question I posed earlier, the two possible answers seem to be “cold weather” and/or “a too-damp environment”. Because as you can see, this courgette has had the chance to mature in wafts of nice fresh air as it dangles over the edge of the container, as opposed to being forced to grow up (as it were) in a more confined space.