London to Singapore, in business class: Qantas or Cathay Pacific?

Why not FCO-DOH-SYD (Rome, Doha, Singapore) on Qatar? Would avoid backtracking to London, but would give you an overnight in DOH for a morning flight to SIN.

Also, if not time OR fare-constrained, the FCO-LHR-HKG-SIN option might provide more miles / status credits - if that's a factor for your consideration .. especially with the backtrack to LHR?

If you've got the points, and take the Qantas option, your Platinum status should give you a half decent chance of getting an upgrade to First. There are far worse ways of using your points than that...

I would be very careful about falling for the Qatar q-suite hype. If you move around at all in your sleep or are a side sleeper, it’s extremely uncomfortable. After having flown it last month I will now go out of my way to avoid Qatar.

Cathay and Finnair business better than QF A380 business. Newer seats and direct aisle access. Cathay lounges at HK airport are superb.

If you can get a business layout on Qantas 1-2-1 then that is OK, but Qantas has far to many planes still equipped with sky beds with not all seats having aisle access, and its just not about the seats, but the head phones and screens just don’t cut it when compared to an A350.

Wondering why you are only including QF and Cathay as options. Personally I’d want a pretty good reason to go via HK above a direct flight. I’d give serious consideration to Qatar. Q suites is miles above the QF hard product, the stopover adds less time to the journey than HK and they often are considerably cheaper than the other options you state.

I would say CX product is a lot better than that on Qantas A380, however for your safety, please do NOT choose Cathay Pacific at this time.

The Cathay First Lounge is the best in Terminal 3, and beats the Qantas lounge hands down. One of the main differences is that Cathay First Lounge has an a la carte menu - and the food is really good. I've eaten there twice in the last couple of months.

I've flown both Qantas and Cathay in Business Class from London to Singapore. Cathay has the better seat (by far) as it is in a 1-2-1 configuration. Whereas Qantas is 2-3-2 and the extremely outdated Skybed.

I was unimpressed by Cathay's business class food - but then I've been unimpressed with most airline's business class food - realistically it's re-heated food and at best reaches the standard of an average cafe. The worst business class food has to be on British Airways and American Airlines. Slop/swill - literally looks like a microwave meal. So much so that on UK to USA flights I now just buy something fresh from inside the terminal (sandwich, fruit salad, yoghurt etc) and just avoid eating on the flight.