The referendum was calculated centrally so it is not clear what the geographic spread of voting was .
An exit poll found that out of all eighteen constituencies , only Ian Paisley 's North Antrim stronghold voted against the Agreement .
The referendum was calculated centrally so it is not clear what the geographic spread of voting was , but an exit poll found that out of all eighteen constituencies , only Ian Paisley 's North Antrim stronghold voted against the Agreement .