The margin between the two sides has not narrowed, it has widened! Fully half of all constituencies have now declared a final result.
This most recent update courtesy of RTÉ:
“With results in from 21 of the 43 constituencies, the Lisbon Treaty is being beaten by a margin of 54.6% to 45.4%. That margin is expected to tighten as more results are announced, but the result is not in doubt.”
Results are now in from both Dublin South and Dún Laoghaire. As expected, both constituencies delivered a Yes vote (by margins of 62.9% to 37.1% and 63.5% to 36.5% respectively).
See the top ten Yes/No constituency results here.