Hairy caterpilla.

Since finding lots of eggs on my cabbages the children and I have been collecting all the eggs and caterpillas we can and keeping them in a caterpilla farm (a tesco online shopping tray). We have had lots of tiny ones hatch, two sets of eggs just today and picked lots of them from the vegetables. We have loads probably over 150 with all the babies. We give them fresh cabbage leaves and check them after rain etc. I thought we had 3 types, large cabbage white, small cabbage white and what I think is a turnip moth. Today though I found this little spiky haired fellow. Very cute and tiny. Going look him up now and see if I can see what he is unless one of you knows?