Around £500k to live a frugal existence, and £2m to live it large, assuming the majority of the money was invested in the stock market. It probably wouldn't be very fun never working again though, as you'd miss out on social interactions with colleagues and the rush of trying to achieve some goal.
I'm pretty much starting out in my career though, so the true number may end up being much higher, and my enthusiasm may wane after doing this for a decade.
I'm pretty much starting out in my career though, so the true number may end up being much higher, and my enthusiasm may wane after doing this for a decade.