Here is why the exit poll is so important (I posted this in the lead up yesterday, hope it helped!):

In the last two elections, the exit polls called the results almost exactly

TThat's why cable has had such a big jump.

There is doubt on the margin of the apparent Tory win and the poll will be questioned.

The results of the exit poll again:

CON - 316
LAB - 239
LDEM - 10
UKIP - 2
SNP - 58

Updated price action - Cable has jumped immediately on the exit poll seat projection:

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Here is a guide to the times to watch as the night progresses, and when to expect more definitive results

That's a guide to how the election will be decided.

If you want more detail, perhaps who is running second in Great Upper Sodsbury, or something like that, more here