Thanks all for the sound advice. Obviously need these guys to decide their dates asap and then get onto booking it as soon as fares become available. I think we will probably be looking at a round the world trip as it will be our biggest trip to date and since we will have gone that far already.

Playing around on the oneworld tool, fare came up at 15k for the two of us in business, sure the dates were wrong but that does sound like a lot!

I will continue to play around once we have the dates.

Really glad I came on here to ask - thanks all.