Have I Got Major Political Upheaval for You

28 September 1990: The first ever episode of Have I Got News for You is broadcast on BBC Two.
28 November 1990: Margaret Thatcher leaves office, twelve days after the first series of HIGNFY has finished its run. The show's official board game later invites fans to "draw their own conclusions".
9 April 1992: A special, standalone edition of HIGNFY is produced for the 1992 General Election, the only episode of the show (to date) to not officially be part of any series.
6 November 1992: The show responds to the results of a United States presidential election for the first time, as Frank Skinner and Jerry Hayes MP are tasked with reacting to Bill Clinton's victory.
4 June 1993: Roy Hattersley is replaced with a tub of lard.
24 December 1993: For the HIGNFY Christmas special, Ian and Paul swap sides and dress senses, which a tie-in book will later claim is an attempt on Ian's part to win for a change. Paul wins the show by a record 23-10 margin.
3 June 1994: Ian Hislop appears on HIGNFY despite suffering from appendicitis at the time and having to return to hospital the moment the recording is over.
30 October 1995: A special VHS-only episode of the show, Have I Got Unbroadcastable News for You, is released.
19 April - 7 June 1996: Paul Merton takes a sabbatical, and is replaced by a string of guest captains for Series 11.
11 October 1996: The 100th episode of HIGNFY is broadcast. Not long after, Bill Clinton wins re-election.
18 October 1996: Former Chancellor of the Exchequer Nigel Lawson is (arguably) the highest-ranking politician ever to appear on the show.
1 May 1997: HIGNFY broadcasts its 1997 election special, inexplicably recorded and broadcast before any results have come in.
9 May 1997: The Hamiltons' infamous guest appearance, just one week after Neil lost his seat.
3 November 1997: The second VHS-only episode, The Official Pirate Video, is released.
28 May 1999: In one of several guest bookings the producers probably regret in hindsight, Jimmy Savile appears on the show.
14 April 2000: David Shayler appears on the show via live satellite link-up.
20 October 2000: The show broadcasts its first episode on BBC One.
10 November 2000: This week's edition of HIGNFY is intended to react to the US presidential election, and Rich Hall is on the panel for this purpose, but the election result is thrown into chaos over the Florida result and George W. Bush will not be declared president for over a month.
25 May 2001: Sir Elton John pulls out of the show at the last minute and is replaced by a lookalike.
8 June 2001: The show's third General Election special is broadcast.
24 May 2002: After revelations about his private life in the News of the World earlier in the week, what has come to be known as the 'Angus Scandal episode' is broadcast.
25 October 2002: Following another week of tabloid exposes, Deayton's final episode is broadcast. He is sacked early the following week.
1 November 2002: The first guest-hosted edition, with Paul in the chair and Ross Noble taking his place as team captain, is aired.
8 November 2002: The 200th episode of HIGNFY is broadcast.
5 November 2004: The show reacts to the 2004 US presidential election.
6 May 2005: The show's fourth General Election special is broadcast.
27 June 2007: Gordon Brown becomes Prime Minister of the United Kingdom.
2 May 2008: Gordon Brown's disastrous premiership is already a running joke on the show.
24 October 2008: The 300th episode of HIGNFY is broadcast.
7 November 2008: The show's only US Election-themed special is broadcast, as Barack Obama wins a landslide victory.
21 November 2008: Paul Merton misses this week's recording with a kidney infection.
15 May 2009: The MPs' expenses scandal has already been simmering, but this is the week where it really explodes and the show dedicates its entire first round to it. The episode in question is hosted by Rolf Harris and highly unlikely to ever be repeated again.
1 April 2010: The show moves to Thursday nights. The stated reason for this is so they can show a General Election special on 6 May, polling day. However, the BBC then realise on the day before recording that if this goes ahead they will be forbidden by broadcasting guidelines from mentioning the election at all in case they influence the way people vote.
7 May 2010: The Election special is thus hastily rescheduled for this date. It is recorded early in the morning so they can react to the final result, which is only slightly ruined by the fact that the result is a hung parliament and a new government will not be formed for four more days beforehand.
8 April 2011: Having continued with the Thursday slot for its Autumn 2010 series, the show returns to its rightful Friday slot.
13 May 2011: The first ever episode to have more than one host is broadcast, with MasterChef's John Torode and Gregg Wallace in charge.
12 October 2012: The show responds to the Jimmy Savile sexual abuse allegations, discussing the fake 'transcript' from his 1999 guest appearance.
9 November 2012: The main topic of discussion on the show this week is Barack Obama winning re-election in the US.
6 December 2013: The show broadcasts its 400th episode, albeit moved to an 11:25pm slot because of the death of Nelson Mandela.
8 May 2015: The show's 2015 General Election special is broadcast, once again recorded early in the morning.
5 June 2015: The show pays tribute to former Liberal Democrat leader Charles Kennedy, who died earlier in the week. It is the first such tribute in the show's 25-year history.
24 June 2016: I'm sure something significant happened on this date, but I'm struggling to recall it. There might have been something else quite big a few weeks later?
11 November 2016: Guest host Charlie Brooker responds to the results of the week's US Presidential election as follows: "In the news this week... AAAAAAAARRRRRRGGGHHHHH!!!!!"
16 December 2016: Former Secretary of State for Education Nicky Morgan pulls out over a furore regarding the Prime Minister's leather trousers and is replaced by a handbag.
21 April 2017: The show conveniently comes back on air in the same week Theresa May calls a snap election.
2 June 2017: The show is moved to BBC Two by an election debate, and decides to mark its temporary return to its old home by using an old-style BBC Two ident for the continuity announcement. It inexplicably uses one from the 1970s.
9 June 2017: The Election special is once again recorded early in the morning as it reacts to the ongoing clusterfuck that is the snap election result.