Looks like I haven't just killed thirteen bramble cuttings! This is excellent! It means that the experiments are definitely going ahead (I've been biting my nails over this one) and that at the end of it I'm likely to have a viable plant with which to carry on the lineage of brambles that have lived up to now in the front garden. Think in terms of Noah's Ark if that helps.
Pics when the camera turns up.