Earlier quoted context omitted.
London has long benefitted from its position allowing its working day overlapping everywhere from the US West coast to Japan, even if barely at those extremes. Most of the world's population lies between UTC-5 and UTC+5 I believe.
Most of the world's population lives inside the Valeriepieris circle https://en.wikipedia.org/wiki/Valeriepieris_circle which is covered by the time zones UTC+5 through UTC+8. So if you want to be as close as possible to as many people as possible, somewhere in Myanmar would be a better choice than London. Of course the calculus changes if you also consider how much money each of these people has access to.
That changes the equation