I remember Dave posting a while back about finding a larva in some vegetables and have been a bit more careful since then. I've just found one in some broccoli, from the Netherlands, which I think is a Green-veined White. Length is 14/15mm.
It's now in a big plastic pot with some tissue paper and some of the broccoli to feed on but, never having reared anything through before, I'm not sure where to go from here.
Also, is there any particular way of submitting this type of record?