Sydney is well worth flying to the other side of the world for, with its iconic landmarks, like the Sydney Opera House, Bondi Beach, and Sydney Harbour Bridge.
Down in the southeast of Australia in New South Wales, Sydney is in full summertime swing in January (the hottest month), with average high temperatures of 27 degrees and eight hours of sunshine a day. It's humid too.
Sydney is 11 hours ahead of the UK, and it takes at least 21.5 hours to get there with one stopover, but you could make this a two-centre trip, with a stopover somewhere like Singapore, Hong Kong, or Dubai.