At least one major investment bank has told its HR staff it is planning to move, and will start processing redundancies or staff transfers as soon as possible. The people and the money started preparing to move months ago - the question is just how much of it.

In any case, expect a lot of the money to pile into other currencies and not get spent as people try to ride this out.

And how much talent in London are foreigners ?

Because the anti-immigrant nature of the Leave campaign e.g. from UKIP suddenly makes the UK look a lot less inviting. If the Visa situation doesn't get a whole lot worse.

Money will quickly escape to New York and Frankfurt

Watch the opening of the London exchange and review your comment.

The exchange is getting hammered, as expected, as equities are extremely liquid and the first thing that gets sold off during times of uncertainty/volatility.

I think a more interesting metric will be the price of land in London and the change in the rate of flows in/out of the property market in the coming weeks. Less liquid, less prone to volatility, more indicative of long-term economic trends for the city.

FTSE 250 chart is just "frowny face" right now for me.

For now, that is.

They weren't there 30 years ago.