Gold upgrades book into P (first) or J (biz), which is different for other non-ROP Gold bookings (AFAIK).
Amended to add. When recently flying FRA-BKK, there was no P showing as available for the day I wanted on the flight I wanted, but THAI cleared this for me - whichwas perfect!
Last edited by Thai-Kiwi; Jul 16, 2007 at 3:27 am