[mike4scuba]

They are open 24 hours at the flying club so maybe worth calling as soon as your flights are released
6am maybe

Not sure if you can book the outward as soon as it's released then book the return when that's released

If you wait 2 or 3 weeks until the return is available the outward may have increased in price, become unavailable or the seats you wanted have gone.

Not sure how this affects the cost of booking the flights separately maybe someone who has done this method could reply