Like oldgoat I have been gathering blackberries, greengages and bullaces What I have noticed this Autumn, as well as the super abundance of fruits, is how early everything has been.
In my area the blackberry season starts slowly in late July/early August, is in full swing late August - late September and peters out in early October. This year it started suddenly and full pace in early August and by early September was over. It was the same with sloes, damsons, greengages and bullaces, Rather like this year's Autumn that started in mid-August.
Rose hips are a rich source of Vitamin C. This is why they were collected so assiduously and made into Rosehip syrup during WW2 and afterwards.