Guess the plant

My meadow border is finally coming into flower. According to the website, the flowers should include; Shirley Poppy, Californian Poppy, Cornflower, Fairy Toadflax, Red Flax, Bishop’s Flower, Tickseed and Corn Marigold, Black-eyed Susan, Red Orache and Larkspur.

This is the first flower and it looks suspiciously like rapeseed from the neighbouring fields.