I don’t think I’ve seen leafmines on this plant before – this is Bittersweet (Solanum dulcamara), and the mines can also be found on other members of this plant genus, Tomato (S. lycopersicum) and Potato (S. tuberosum), as well as on Deadly nightshade (Atropa belladonna).

The miners here are the larvae of the moth Acrolepia autumnitella, a very pretty little chestnut-coloured creature, which is shown on the UK Moths website. As you can see in my images, the larvae create quite large blotch mines, and these can be found twice a year, in June and September. I haven’t yet found a pupa but I will keep looking because the silk cocoon that surrounds the pupa looks rather lovely, as a photo on the British Leafminers website shows.