I think you will have a chance that you will find some new varieties in your seedlings. Maybe some ugly, but some will look similar or even look better than the parent and some will look like the wild type.
After a few generations I expect they all tend to get closer to the wild type. I grow both the wild type and "robinsoniana" but the seedlings are the wild type, but these are open polinated. Maybe you are lucky and have varieties with a stable genetic variation.
As for the seedlists, I hope they will soon be published on the web so not only UK members can have a look on the without doubt impressive list, but I do not mind if the ordering will be later.