A random look shows availability excellent on all the TG flights. Business Class is also there, as indeed (on the 747 flights only) First Class.
15k miles plus tax one-way in Y. However, why not go cash and miles instead? Y is 7,500 plus £50 plus tax each. It is, after all, nearly a 3 hour flight. Taxes will be roughly £30 each looking at Expedia.
Given that Business Class is only an extra 3,750 miles and £25 each on 'cash and miles', though, I'd go for that. On the 747's and probably 777's, Thai uses its long-haul planes to fill up time during the day so you would probably get a proper long-haul sloping-flat-bed seat. In F you'd presumably get the proper bed on the 747's. Given how few extra miles you need, why go Economy? Buy the extra miles you need if necessary.
The upgrade is especially worthwhile if you don't have *A status as it would also get you lounge access in HKG, where you could easily drink your way through the extra cost of the upgrade! Have some fun, go F or J. Life is too short for 3 hours on Air Asia, especially given the modest cost of doing it properly.
Last edited by Raffles; Jan 7, 2009 at 8:36 am