Britain goes to the polls on Thursday to decide whether to leave the European Union or remain a member. Polls open at 7.30am and close at 10pm after which 382 counts will take place in 216 centres.
Sunderland is expected to declare at about 12.30am on Friday but the majority of centres will have results a few hours later, between 3am and 4am.
The outcome of the referendum should be clear by 5am, well before the final declarations at 7am. The full result will be announced in Manchester a short while later and a statement from prime minister David Cameron is expected around mid-morning.
The Irish Times will run a live blog throughout the night featuring up to the minute coverage on the count as well as comments and observations from our correspondents. The blog will continue into Friday breakfast time for all the reaction when the result it known.
Our team of correspondents in London, Brussels and Belfast will also file regular updates as events unfold.
On Friday, London Editor Denis Staunton will look at where the campaign was won and lost; European Correspondent Suzanne Lynch will explain what the referendum means for the EU; Deputy Political Editor Pat Leahy will ask what next for Ireland and Business Editor Cliff Taylor will gauge the impact on the markets.
The Irish Times will also have rolling video updates throughout the night as well as photo galleries from the count centres.