Alphatono wrote:
This year I had massive issues with rot on the end of my courgette &
at the base of the plants I had it on all 5 plants & then on my
squash.

Any idea what it could be & will it affect me next year. Was all find
previous years.

Google "blossom end rot" for a million hits. You are probably watering
unevenly. Unless it is deficient calcium in the soil watering evenly in
future should fix it.

D