>> Leave or remain, Britain's conservative party faces a tumultuous period. I'm William James, UK Political Correspondent in Westminster where Britain's EU referendum has exposed deep divides in David Cameron's ruling party. If it's a vote to remain in the European Union, Prime Minister David Cameron is faced with the difficult task of piecing back his party.
This campaign has split the conservative party down the middle and he's got to now rebuild those bridges with the people who are on the other side of the argument and make sure that he can push through for the final three years of his term, the agenda that he wants to get through.
If it's a vote to leave, the equation's entirely different. Prime Minister David Cameron will probably have to consider his position, certainly, and many will expect him to actually resign. The main person to watch out for is Boris Johnson. He's the one who carries a lot of sway within the party amongst the Euro skeptics but also at the grassroots of the party.
And it's the grassroots of the party that really control who will be the next leader of the conservatives when David Cameron steps down, whether that's straight after the vote or whether that's in the next election in 2020.>> It's been really interesting to watch how the senior Tories on either side of the debate have dealt with each other.
What they've been really keen to avoid doing is attacking each other in public but they've not always been completely successful in doing that. There have been pointed words from both David Cameron and Boris Johnson at each other, albeit not naming each other, but it's clear who they're talking about when they're criticizing the opposite campaign.