I wonder how can people throw around such fantasy numbers with a straight face as if anyone can easy get them with a bit of work and elbow grease. I don't doubt he's making that kind of money but it would be nice to not push cases of obvious survivorship bias as being the norm.

Yearly tech compensation ranges from 100k to 1M. I'm sorry you feel like that must be a lie.

£1000/day is still “just” around £250K/year, and at this daily rate you won’t have it easy as a contractor. Highly paid gigs are not as plentiful, are normally shorter, and require very active search and sales work. You always need to find your next similar consulting gig quickly once your current one is over — every day of downtime or non-billable work between gigs costs you £1000!

In short, parent comment got it wrong, tech in London doesn’t pay you £300-400K/year.

Not as a base salary, no. They would have a performance bonus (you’ll keep a percentage of your trading income done via firm), but even then making £300-400K/year is… challenging