Most of us plebs take a stopover. Dubai is the most popular. London to Dubai is about 7 hours. Then Dubai to Sydney is another 14 hours. Total: 21+ hours with a layover.
Singapore is a solid choice too. You get a break at Changi Airport—you know, the one with a waterfall and a butterfly garden. It’s like a mini-vacation in the middle of hell.
Doha and Abu Dhabi are also options. They’re all roughly the same: long. You’ll bond with strangers over how sore your back is.