See Thai forum:

http://www.flyertalk.com/forum/thai-...-26oct-13.html

See article at:
http://www.ausbt.com.au/thai-airways...sydney-flights

UPDATE | Thai Airways has backtracked on its decision to withdraw first class from Australia, with 'Royal First' flights to continue between Sydney and Bangkok.

TG471, 472, 475 and 476 were all to be downgraded to a Boeing 777 from October 26, although the airline has reinstated the Boeing 747 on its Australian flights.

Unlike the Boeing 747, Thai's Boeing 777s come without first class. Sydney is Thai Airways' only Australian Boeing 747 destination, with the jumbo's disappearance previously flagging an end to the airline's first class service to Down Under.

A Thai Airways spokesperson confirmed the shake-up to Australian Business Traveller, advising that first class will continue to be available on both of Thai's flights between Sydney and the Thailand capital.

First class fares are currently being withheld on TG475/476 from October 26, so if you're looking to travel in first class after that date, you'll need to patiently await their reappearance.

Flights between Perth and Bangkok will also get a rejig, with the Boeing 787 Dreamliner currently making an appearance from September 21 through to October 25 before the older Airbus A330 returns from October 26.