Hi May - glad you're a elbow Naked fan! I too thought I had dandruff or at least very dry skin and used body shop ginger shampoo for that purpose (still love it actually but it does sls in and boy does if foam!), but I hate to tell you in case you don't already know that Naked was discontinued some months ago
I was gutted bc I loved their skin care and washes too - as well as one of their shampoos (one that I tried really stripped my hair badly mind you!), as they're good stuff on a budget too.... I've found some end of line at other places such as fragrance direct but basically it is no more boo!
Good luck finding a replacement for it. I am sticking with the body shop for the moment!