BBC Copyright: BBC Social Democratic and Labour Party leader Colum Eastwood Image caption: Social Democratic and Labour Party leader Colum Eastwood

The first question in the Northern Ireland leaders' debate is: Do you believe Brexit makes a united Ireland more likely?

Social Democratic and Labour Party leader Colum Eastwood is first to answer.

"We have to deal with the crisis that we're in, which is Brexit," he says, adding: "It's already shaken our peace process."

Mr Eastwood says he's backing another referendum and wants to be part of a "pro-Remain coalition".

DUP chief whip Sir Jeffrey Donaldson says he does not believe there's an "existential threat" to NI's position within the UK.

"We can't go on with this situation where we ignore what people say," he says. "The poll was held, the people voted."

He said the DUP has been "absolutely crucial" when it comes to Brexit, adding that it blocked the Brexit deal.

Ulster Unionist Party leader Steve Aiken clashes with Sir Jeffrey over the DUP's stance on the Brexit deal.

Mr Aiken says that on the 2 October, DUP leader Arlene Foster said the deal was sensible. "You agreed on the 2 October to put a border down the Irish Sea."

Sinn Fein vice-president Michelle O'Neill says: "There's nothing good to come from Brexit."

Referring to the original question about a united Ireland, she says Brexit "certainly makes people focus their minds about where people think their interests are best served".

The leader of Alliance, Naomi Long, says Brexit has "certainly made Northern Ireland less stable".

She says it has brought arguments around borders back to the fore.