counting completed and results officially announced: 17,410,742 (51.9%) for 'leave' (including majorities in both England and Wales, and in 270 out of 399 counting districts) and 16,141,241 (48.1%) for 'remain' (including majorities in Scotland, Northern Ireland and Gibraltar).
further falls on global stock markets, with trading in stocks of some UK banks briefly suspended;
finance minister George Osborne and the Prime Minister sought to calm fears through public statements;
the majority of senior figures in the Labour Opposition had resigned by the afternoon, and a confidence vote on Jeremy Corbyn's leadership was called for the following day.
28th:
Prime Minister Cameron met with EU leaders to discuss the Brexit vote.
Corbyn defeated by 172 votes to 40 in confidence vote among Labour MPs; refuses to resign.
29th:
Scottish First Minister Nicola Sturgeon held talks with senior EU figures on protecting Scotland's relationship with the EU, but no agreement was reached.
For the first time in its 41-year membership, the UK was excluded from a full meeting of EU state representatives, who discussed their positions on Brexit.
1st leadership ballot of Conservative MPs: May 165, Leadsom 66, Gove 48, Crabb 34, Fox 16, abstention 1 (the Prime Minister chose to be neutral even in private); bottom candidate Fox eliminated by the rules; Crabb withdraws.
7th:
2nd ballot: May 199, Leadsom 84, Gove 46, abstention 1; Gove eliminated; final ballot to be held by all party members.
11th:
Angela Eagle challenges Jeremy Corbyn for the Labour leadership
Andrea Leadsom withdraws from the Conservative leadership contest; Theresa May officially declared the winner
12th:
Labour Party National Executive Committee declared that Jeremy Corbyn would automatically be a candidate in any leadership contest.
House of Commons gives 2nd reading to bill authorizing Prime Minister to give notice of leaving, by 498 votes to 114
2nd:
Government white paper giving more detail on negotiating position
7th:
Government announces that on conclusion of negotiations Parliament would be able to choose between draft deal and default rules of World Trade Organization
8th:
House of Commons gives 3rd reading to above bill, by 494 votes to 122
results: 317 Conservatives, 262 Labour, 35 Scottish National Party, 12 Liberal Democrats, 10 Democratic Unionists, 7 Sinn Fein, 4 Plaid Cymru, 1 Green, 1 Independent and the Speaker
House of Commons votes 303 to 296 to amend the Finance Bill to deprive the Government of powers to amend tax law to deal with an exit without a withdrawal agreement
15th
House of Commons votes 432 to 202 to reject the agreement (largest Government defeat on record; also first rejection of an international agreement by the Government since 1864)
29th
House of Commons passes[14] a resolution saying it "rejects" leaving without an agreement, "requires" alteration of the arrangements for the Irish border, and "would support" an agreement so modified
in more "indicative votes", MPs vote against all 4 motions selected by the Speaker
3rd
After taking over Government time, House of Commons passes (315 to 310 2nd reading, 313 to 312 3rd reading) a Bill giving the House of Commons the power to order the Prime Minister to request a postponement, and to specify the date to be named in that request
4th
2nd reading in House of Lords
8th
Amended in House of Lords; Commons accept Lords amendments; royal assent
UK results (73 seats): 29 Brexit Party, 16 Liberal Democrats, 10 Labour, 7 Green, 4 Conservative, 3 Scottish Nationalist, 1 each Plaid Cymru, Democratic Unionist, Sinn Fein and Alliance
29th
Scottish Executive introduces legislation for another independence referendum to Scottish Parliament (which has no legal power to hold one)
On the "advice" of the Prime Minister, the Queen approves an Order in Council to prorogue Parliament for about half the time remaining till the currently scheduled exit day; longest prorogation since 1945
Prorogation condemned by Speaker of House of Commons
Legal challenge to prorogation lodged with Court of Session in Edinburgh (English High Court being on holiday)
Departing from custom, Speaker authorizes substantial motion in emergency debate
That motion, taking time from Government for a bill to obstruct leaving without a withdrawal agreement, passed by 328 to 301[15]
21 Conservative MPs expelled for rebelling in that vote, including Churchill's grandson and two former Chancellors of the Exchequer, one of them also Father of the House
4th
Bill passed through Commons
Motion to call a general election fails to meet the required "supermajority"
4th/5th
For the first time on record, House of Lords passes a motion limiting discussion time on bill
9th
Royal Assent to Act ordering the Prime Minister to request a 3rd postponement unless the House of Commons approves a withdrawal agreement, or leaving without one, by 19th October
House of Commons votes (again in an emergency debate) by 311 to 302 to call on the Government to release various communications and documents
9th/10th
another call for a general election fails
Parliament prorogued amidst rowdy protests in Commons and dignified ones in Lords
11th
Court of Session reverses its earlier decision that prorogation was lawful; appeal to be taken to UK Supreme Court
24th
Supreme Court unanimously rules prorogation unlawful and of no legal effect, authorizing the Speakers of the two Houses to reconvene them immediately
Parliament prorogued, this time without dispute, ending longest session (over 2 years) since "Long Parliament" (legally[16] a single session approaching 20 years, 1640-60)
14th
Parliament reopened with Queen's Speech
17th
revised agreement between Government and Commission
19th
House of Commons, in first Saturday sitting since 1982, votes 322 to 306 to defer approval of agreement
Prime Minister sends letter requesting 3rd postponement, as required by Act above, but without signature (not specified in Act)
He also sends another (signed) letter stating his position that it would be a bad idea
21st
Government publishes Bill to implement agreement
22nd
House of Commons votes 329 to 299 in favour of 2nd reading
but 322 to 308 against the Government's proposed 2-day time limit for detailed discussion
24th
Research finds majorities on both sides think violence against MPs is a price worth paying
28th
ambassadors of the other 27 governments agree 3rd postponement; it is not clear when this was formally ratified by those governments themselves
3rd request from Government to House of Commons for a general election fails
29th
House of Commons approves a bill for an early election, unopposed on 2nd reading, 438 to 20 on 3rd
31st
Royal Assent to Early Parliamentary General Election Act 2019; first time individual election called by Act of Parliament
results: 365 Conservatives, 202 Labour (worst since 1935), 47 Scottish National, 11 Liberal Democrats (not including leader Jo Swinson), 8 Democratic Unionists, 7 Sinn Fein, 4 Plaid Cymru, 2 Social Democratic and Labour Party, 1 each Green, Alliance, independent[17] and Speaker; no MPs left from before UK joined the European Communities in 1973
17th
Parliament reconvenes
new Father of the House of Commons Sir Peter Bottomley presides over formal reelection of Speaker, formally confirmed on behalf of the Queen
17th-19th
MPs sworn in
19th
Queen's Speech
20th
Commons gives 2nd reading to withdrawal agreement bill by 358 to 234
↑without a final vote, after the "rejects" part was passed by 318 to 310 and "requires" and "would support" by 317 to 301
↑This was the new Prime Minister's first Commons vote. The last PM to lose his first Commons vote was William Pitt in 1783.
↑In fact, the army closed down the purged "Rump" of Parliament in 1653, briefly restoring and de-purging it towards the end of its life.
↑Nominated as SNP candidate but disowned by the party before polling day. As this happened after close of nominations, the ballot paper could not legally be changed, so he was listed there as SNP, but he is officially an independent MP.