Thank you everyone - nearly the end of the season, but still they keep on coming.
Monday 6th November: a sharp frost this morning - the car needed a good deal of scraping first thing, and declared it to be just 1 degree above zero. Easily low enough for temperatures on the ground to be below zero but as far as I could tell going out at lunchtime, none of the young nettle plants seemed to have been frosted. In fact, the first butterfly I saw was a Red Admiral fluttering over them appearing to be egg-laying just as I'd seen last week.
Sure enough, I found a shiny green dot on one of the plants.
Over the course of a longer walk today, I found another seven Red Admirals.
Amazingly, one or two seemed fairly fresh, though time has taken its toll on most.
I also came a cross a single Comma, still sucking the last drops of nectar from the ivy, and also moisture from the leaves (or perhaps nectar washed onto them by the recent rain).
No one can declare the season over yet...
Dave