The season is definitely turning, and it's time to think about planting on the allotment for autumn and winter.
For me, autumn planting falls into two categories: things which you can plant now to harvest in the spring; and things which you can plant now to harvest over the autumn and winter, possibly with the help of a cold frame or two.
Planting for next spring
In the first category, this year I'm intending to plant broad beans and early peas in November, as usual; onions, after reading something suggesting that you can get an early spring crop with certain varieties planted in October; and purple sprouting broccoli.
I'm intending to plant lots of broad beans this year; previous years have seen only a few, and they don't crop all that heavily. They finish very early, so something else can use the same ground afterwards. I also have a catch crop of broad beans in currently (planted in August) which may yet produce the odd bean if it stays mild and the sun comes out.
Planting for this autumn
In the second category, there's kale, broccoli raab (which will probably do better in a cold frame), mustard greens, and pak choi. All of which I've tried before with varying levels of success.
More experimentally, I'm going to try an October sowing of carrots and turnips, to see how they do. They're unlikely to get very big, but apparently a late sowing of carrots can yield a few small but tasty roots, so we'll see what happens.
And there is, of course, all the usual tidying-up to do: dig up the potatoes and other roots, cut back the asparagus, mulch various things with compost, pick the rhubarb (and make jam!), dig up the horseradish that has now been there for 2 years due to being enormous and very difficult to extract, cut back blackberries and raspberries and dig out any rogue interlopers, prune the blackcurrant bush and perhaps the apple tree... Still busy despite the end of the main growing season!