Hi again Sam,
I will send you a message on your other post but just wanted to send you this link. You can search on Manuka (top right search) and come up with lot's of posts and from what I have seen it helps some and not others but it may be wise to check with his doctors. Klo is a friend and also from NSW and she and others have posted some interesting information here.
http://oralcancersupport.org/forums...;Words=manuka&Search=true#Post135924
Gabriele

History Leukoplakia bx 8/2006 SCC floor mouth T3N0M0- Verrucous Carcinoma.
14 hour 0p SCC-Right ND/excision/marginal mandibulectomy 9/2006, 4 teeth removed, flap from wrist, trach-ng 6 days- no chemo/rad.
6 ops and debulking (flap/tongue join) + bx's 2006-2012.
bx Jan 2012 Hyperkeratosis-Epithelial Dysplasia
24cm GIST tumour removed 8/2013. Indefinite Oral Chemo.

1/31/16 passed away peacefully surrounded by family