Is she? I did wonder because it's not exactly a common name. They have a range of about three or four drinks in our local Tesco. There's the D&B, Ginger beer, traditional lemonade and something else I think...I'll have a look today.
Robyn perhaps you can buy the dried root if you can't find it fresh in NZ? I used to make ginger beer too and the kids love it but I haven't had time for years. All right, I know it's full of sugar too but at least I know exactly what else is in it!
Burdock is a plant which, obviously has a root and it is the root that is used in the drink but you can also use the young stems, both as a vegetable and candied like angelica. The drink was originally taken as a health drink, as were many of the herb beers. Dandelion is a diuretic which will flush out toxins through the kidneys, and burdock is a blood cleanser and purifier which takes out the toxins for the dandelion to get rid of.