• Most MPs (who declared their intention before the vote) voted Remain.
• 479 MPs said they were voting Remain: 158 Leave.
• 75% voted Remain: 25% Leave.
• Most Labour MPs voted Remain (96%).
• Conservative MPs were more split although most voted Remain (57%).

Source: http://www.bbc.co.uk/news/uk-politics-eu-referendum-35616946