The Guardian reports —

A poll taken by YouGov after people voted in the Scottish referendum predicts a victory for No by 54% to 46% for Yes. The survey involved 1,828 people after they voted today, together with the postal votes of 800 people, and was not a traditional exit poll.

[Scottish independence referendum result - YouGov predicts 54% no, 46% yes - live, by Andrew Sparrow, Claire Phipps, and Paul Owen, September 18, 2014]