How to search for Qantas Classic Reward seats Perth-London June 2018?

I’m looking at redeeming some points on a direct Qantas flight from Perth to London in June next year. I can only get my search to show classic reward seats in economy and can’t see the option for another other classes. I have searched over many different dates to check. Is there a way to search this or does it mean there isn’t anything higher than economy available?

It means seats are gone. June during European summer is start of peak season.