MPs will today decide whether to back Boris Johnson's Brexit deal and pave the way for the UK to leave the EU on October 31.
MPs have rejected Theresa May's revised EU Withdrawal Agreement, plunging the UK into fresh political crisis.
House of Commons speaker John Bercow has warned another meaningful vote on Theresa May's Brexit withdrawal deal may be blocked.
There are fears of multiple fatalities after a suspected terrorist attack near the Houses of Parliament in London.
A round-up of some of the key moments as Britain opted to leave the EU.
The House of Commons is trying to shed some of its stuffy image, with clerks no longer expected to wear wigs while great matters of state take place.