one of these is the caterpilla of the common rustic/cabbage moth. it later turned into this, they both did the same thing, it stayed that way all winter then the moth emerged last week.
No identification made yet.
No interactions present.
I don't think it is Common Rustic, as pciture indicate the caterpillar of that species is green with a more tapering look.
Do you have a picture of the adult moth. Common Rustic and Cabbage are quite different so it should be easy to work out which it is from that.
Yes there is a picture. There was 2 caterpillas both turned into cocoons. The picture is the one that emerged. In my observations the picture is DSCF6699, The other cocoon has not yet emerged. I think it is still ok though.
It was http://www.ispot.org.uk/node/267250 I think.
Still not convinced I got the right ID for that as Cabbage Moth though.
Lat/Lng: 52.9043, -2.1506
OS grid ref: SJ899341