Six days later the eggs had hatched. and I could find one 1st instar Painted lady (Vanessa cardui) larva on the Common mallow (Malva sylvestris).
Painted lady (Vanessa cardui), 1st instar on Common mallow (Malva sylvestris)
Painted lady (Vanessa cardui), 1st instar on Common mallow (Malva sylvestris)