Q.I bought some seeds which should be carnivorous plants, and they have grown well. I recognise some, like Drosera, but not these two
(sorry, they are looking a bit sunbleached at moment) They look like weeds and the large-leafed one is very sharp. They do seem to be keeping flies at bay, however. The local garden centre didn’t have the foggiest. Can you help me? Thank you. Photo attached.

Certified GKH Gardening Expert
The large one looks a lot like the weed, bull thistle or sow thistle.
Since there are over 200 varieties of carnivorous plants, you may need to wait and see what kind of "diet" they prefer. I did a search of images and do not see anything similar in the photos of carnivorous plants. I would send the photos to whoever you bought them from and ask for an ID, or send them to an online seller of carnivorous plants for an ID.
Here's an article that may interest you. https://www.gardeningknowhow.com/houseplants/carnivorous/growing-carnivorous-plants.htm