This evening many sources, including the American BBC broadcast, admitted that the outcome of the voting was too close to call, but that insiders, pundits, and bookmakers were cautiously predicting a "remain" victory.
But at present (10pm CDT), with 57.6% of the vote tallied, "leave" is leading "remain" by 51.5% to 48.5%.
The pound is undergoing a severe fall, as are futures for the S&P 500 - currently implying a Dow average down 500 points at the open.
Live coverage at The Telegraph, The Guardian, and the BBC.
Fascinating. I'm going to be up late tonight.
Addendum: Live coverage on C-SPAN and on CNN International, and of course on BBC. And MSNBC. And CNBC. Birmingham results expected in 15 minutes, and probability of "leave" winning overall is now at 80%.
Pound/dollar has plunged 10%, to lowest level in 30 years ($1.35). And this is with London still asleep at 0430 there.
Scotland has voted - countrywide - to stay in the EU. So if the overall vote result is to "leave," the prospect arises that another referendum will be called to vote on Scotland leaving the UK.
72% voting turnout among the electorate puts the U.S. to shame by comparison.
Addendum: BBC and ITV have now "called" the election for "leave." Historic.
Addendum on the morning after: I was up until the wee hours last night listening to analysts on four different broadcasts. There is an immense amount to read this morning. As usual I start with the discussion threads at Reddit. Here are several of the top-rated ones:
Cameron to resign as PM
A thread for those from other countries
Miscellaneous viewpoints and comments
And one with some humor '"if other countries leave the EU." (credit for embedded image)
No blogging today - I'll be busy surfing the web and trying to peek at the future.