Interesting. Not sure what time the first results are in.
I was trading the Brexit vote and saw an interesting pattern on Betfair. I had bet on remain and intended trading out of it as it was showing a good profit. Everyone on TV was still predicting a remain vote when the odds on leave tumbled rapidly online wiping out my profit and then some. TV was still giving no indication of an upset, and it was a good 15 minutes before news of unexpected leave successes started to filter through. I concluded that some people with a heavy financial interest had people inside key counts and must have made a fortune. Something to watch out for.