Earlier quoted context omitted.
Also different employer expenses per employee, I don't know them off the top of my head but the UK tax levels are pretty high.
High and only getting higher, along with insane housing costs in that area its not an attractive proposal unless you plan to use the experience to move somewhere else.
2.5 years in London to level up my skills and work in a few startups, then buggering back off to Australia for CoL that while still expensive is less than London and much better weather and similar salaries to London.