The Lisbon Treaty has been passed by a two-to-one majority - a 20.5% swing towards the Yes side since the first Lisbon referendum.
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Brian Dowling on the key constituencies
Ireland voted in favour of the Treaty by a final margin of 67.1% to 32.9%. Only two of the 43 constituencies voted against the Treaty.
It was the highest Yes vote in a referendum on Europe since the Treaty of Maastricht in 1992. The turnout was also the highest in a European referendum since the original vote on joining the then EEC in 1972.
The Yes result from Cork South-West saw the 'tipping-point' reached - meaning the Treaty would definitely be accepted, even in the highly unlikely event that all the remaining votes had been cast against it.
Two Donegal constituencies recorded the only No votes. The 13% swing towards Yes in the two constituencies was not enough to take them out of the No column.
In the T�naiste's constituency of Donegal South West, the No side won by just 171 votes.
The margin was higher in Donegal North East, at 848, but Donegal stands alone - every other constituency in the country voted Yes.
The final result shows a stunning swing to the Yes side since the first Lisbon Referendum 15 months ago.
The highest Yes vote was in Dublin South, at just under 82%, closely followed by D�n Laoghaire at just under 81%.
Higher turnout is part of the answer for the swing - the Government and the main Opposition parties, who all campaigned for a Yes, will now argue about who did most to win the referendum.
- RT�.ie Extra Video: Referendum 2009
- Six One News: Martina Fitzgerald reports that the official announcement was made this afternoon in Dublin castle to a chorus of cheers from Yes supporters
- Six One News: Joe O'Brien reports that the big turnaround in the referendum result is a major disappointment for No campaigners
- Six One News: David Davin-Power, Political Correspondent, analyses how people were able to separate the Lisbon issue from dissatisfaction with the Government
- Six One News: Bethan Kilfoil reports that the resounding Yes result was greeted with cheers by pro-Lisbon campaigners who gathered at Dublin Castle for the declaration
- Six One News: Sean Whelan, Europe Editor, discusses the swing towards the Yes vote in the second referendum
- Nine News: David Davin-Power, Political Correspondent, reports that the final results showed the Yes side won 67% of the vote compared to 33% which voted against
- Nine News: Brian Dowling, Political Reporter, analyses the figures and compares voting patterns between the two referendums
- Nine News: David Davin-Power discusses the outcome of the referendum
- Nine News: Bethan Kilfoil reports that the resounding Yes result was greeted with cheers by pro-Lisbon campaigners who gathered at Dublin Castle for the declaration
- Nine News: Sean Whelan, Europe Editor, discusses the timeline for ratification of the Lisbon Treaty