Who Wants to Be a Millionaire? (UK version)

Original 'Ten Night' Experiment
Originally, the show was set up for a ten night run, that involved the public being able to play by picking up the phone and dialing 0891 44 44 44 and answering a question. Then randomly the computer would pick 100 and then the 10 that answer another question correctly will go through. The show proved to be popular so came back for a real series soon after.

Fastest Finger First
10 new contestants are introduced each night after a previous Hot Seat contestant exits. In the first series, after the introductions, the contestants are asked a multiple choice question similar to those given to Hot Seat contestants, and must enter the correct answer on their keypad within 20 seconds. After the time is up, The computer will then give the correct answer, check who got it right, and flash the player who got it in the fastest time; that player advances to the Hot Seat. From the second series until the show's end, the format changed to the version that soon spread to all other versions around the world: The 10 contestants are given a question and four answers, and must put those answers in the correct order, within 20 seconds. After the time is up, the computer will then give the correct order, check who got it right, and flash the player who got it in the fastest time; that player advances to the Hot Seat as before.

Money tree
This was the second and final money tree introduced in 2007 until 2014, and featured 12 questions: Notice that the original had 15 questions between 1998-2007 and 2018-19, and went like this: In both cases, the values are not cumulative; for example; if the contestant answers the first 2 questions correctly, he or she wins £200, not £300 (i.e. £100 + £200).

Lifelines
There were 3 lifelines available to all contestants prior to the 2010 Clocked version, when a fourth was introduced. Some celebrity specials also gave a fourth lifeline, and a few of the 'milestone' shows.
 * 50:50: The computer eliminates two incorrect answers, leaving one incorrect answer and the correct answer.
 * Phone-a-Friend: The contestant calls one of up to 3 friends, who provided their phone numbers in advance. The contestant has 30 seconds to read the question and answer choices to the friend, who then has the remaining time to offer input.
 * Ask The Audience: Audience members use touch pads to designate what they believe the correct answer to be. The audience choosing each specific option is displayed to the contestant.
 * Switch (2002-2003, 2010–2014): Only becomes available when a contestant reaches £50,000. A contestant may swap their question for a different one. This was used back in 2002 and 2003 when a contestant gets rid of a lifeline. A "Q" symbol will appear on the selected lifeline, therefore, the selected lifeline can't be used again. Originally, this lifeline was called 'Flip' and it was activated when a contestant or couple chose to get rid of a available lifeline to flip a question that they didn't want to answer and had a "F" symbol. That version of Switch was avaliable during the 300th show.
 * Ask the Host (2018-): The host can tell the contestant what he thinks the correct answer is.

Telephone Game
During 2003-04, the show featured a special telephone game where viewers had to phone in and to answer questions so that they could win up to a virtual million pounds.

The telephone number was 09064 72 72 72. Phone charges were via BT Landline at a cost of 60p for up to one minute.

However, the telephone game ended in 2004, and the ‘Walkaway Text Game’ followed up several weeks later.

Text Game
See article: Text game (UK).

Tonight's Viewer Question
From S22 EP1 the show featured a competition game called "Tonight's Viewer Question". The competition offered viewers at home to play the game where they had to answer a four-choice question similar to those in the main game, either via SMS or BT Landline. The competition ran through most of the programme, after which the answer was revealed and the programme ended. The telephone number 09012 93 1000 and text number 84644 were used instead of the mobile number 07797 808 900.

The viewers who answered the question correctly won £1,000 by having their entries selected randomly. Entries costed a maximum flat rate of £1.

The IT Crowd

 * In the third episode "Fifty-Fifty", Daniel Carey was a contestant on the show. But, not physically shown in the episode.

The Jonathan Ross Show

 * In an episode of the show with Jonathan Ross as host and Chris Tarrant as contestant parody was shown.

Kelly
In episode on 22nd November 2001, Gerry Kelly, a host of a UTV talk show Kelly (1989-2005) appeared in a 'special' edition of Who Wants to Be a Millionaire? with Chris Tarrant (without the studio audience), who also appears as a guest on the chat show. This episode was broadcast shortly after it was revealed that criminal proceedings had started against Charles Ingram, who won £1,000,000 by cheating. Mr. Kelly walked away with £32,000, answering the £500,000 question wrong.

Harry and Paul

 * In an episode of Harry and Paul, Derek Anderson is on the show with a fake Chris Tarrant and is asked the following question:

Contestants
See: Who Wants to Be a Millionaire? (UK version)/List of Contestants

Trivia

 * The old episodes of the show are still being repeated on the "Challenge" channel, and for a while ITV1 also broadcast interesting moments from the old episodes of English and foreign versions in the program "Who Wants to Be a Millionaire?" Classic.
 * The oldest contestant is 75 years old (Bernard Marco, 11th November 1999), and the youngest is 18 years old (Michelle McGeachy, 5th March 1999). The average age of the participant is 41 years. The most frequently played participants were named John, the participants - with the name Ann.
 * The average result in the Fastest Finger First is 6.41 seconds.
 * The total winnings are almost £60,000,000. The average total winnings for the episode are £114,238, the average winner is £50,200, the average male contestant win is £49,600, the average winnings of the female contestant is £48,500.
 * Martin Skillings, Ben Bartle, Gerry Lennon, Diane Hallagan, Dougie Wilson, Rob Mitchell and James Plaskett were the seven contestants in the UK to save all three lifelines for the £250,000 question.
 * The biggest loss in the game was £218,000 by Duncan Bickley and Rob Mitchell
 * The biggest loss of the famous couple was £468,000 by Laurence and Jackie Llewelyn Bowen. After that, the host again called them into the studio, where they heard the Top Prize question for the second time and eventually took £500,000. The most money ever officially lost by a couple was £93,000 by Robert Brydges & Judith Chalmers and Russell Grant & Sheila Ferguson.
 * The total duration of the show is 10 days 15 hours 30 minutes (September 4, 1998 - May 11, 2018), if you watch it continuously through YouTube.
 * The show was also appeared by contestants with the same names and surnames: 1st Martin Smith on March 6, 1999 & 2nd Martin Smith on March 13, 1999; 1st Chris Elliot (November 20th, 2000) & 2nd Chris Elliott (Series 21); 1st Phil Smith (Series 20), 2nd Phil Smith (Series 21) & 3rd Phil Smith (Series 27).
 * The most "expensive" series was 2000-1 series, where £7,782,000 was won, presumably due to three Top Prize Winners being crowned (Judith Keppel, David Edwards and Robert Brydges, not Charles Ingram, due to the infamous scandal)
 * The total number of contestants in the UK version's history is 1,840 people (in the hot seat - 402).
 * Craig Logue is one of the few contestants, who used all three lifelines before the fifth question.
 * The smallest prize the contestant has taken is only £500 (Cheryl Turner and originally Sheridan Booth).
 * The fastest contestant in Fastest Finger First was Jonathan Pash (aired on April 15, 2008), who managed to press the keys in just 0.97 seconds.
 * Charles Ingram was infamous as being the only UK contestant, who was caught in deception and deliberate cheating. Thanks to the walkie-talkie and the fan in the studio, who coughed the right number of times on each question, he won £1 million.
 * The most widely watched episode in the 20th century was the episode on March 7, 1999, which was watched by 19,210,000 people (2nd place in the ITV weekly rating board), and in the 21st century - episode on January 19, 2000 (15,880,000 people, 4th place in ITV weekly rating board).
 * On November 30, 2002, the 300th anniversary show was shown. While the contestants used the Ask the Audience lifeline, TV viewers were also given the opportunity to correctly answer this question: for each of the four answers, a phone number was provided so that the viewer could give the answer that he thinks is right by calling the appropriate phone number.
 * In September 27, 2003 and February 25, 2006 episodes, there were two cases of a 100% vote (on the £1,000 and £4,000 questions), when after the contestant used the Ask the Audience lifeline, 100% of the audience voted for the (correct) answer.
 * In the March 31, 2007 episode, the right order for Fastest Finger First was (you guessed it!) A-B-C-D.
 * In 2008, a fortuneteller predicted that Richard Ronaldson (appeared on November 18-December 2, 2008) at the age of 35 would become the sixth Million Pound winner, but her prophecy did not come true and he won only £10,000.
 * In the July 18, 2009 episode, there was an unusual case on the £20,000 question: Gill O'Donnell took advantage of the Ask the Audience after 50:50, but 81% of the audience answered the for wrong answer, and she lost £9,000.
 * On December 23, 2010, the Christmas special episode aired. The show was live and the audience had the opportunity to win up to £500,000, answering the question correctly by phone (release review).
 * From December 6, 2011 to 2014, in the Russian TV channel "Questions and Answers" were episodes of 2007-2010 with the Russian translation, including the clocked series.
 * On July 10, 2012 during the game of Donna Hearnden, the "Ask the Audience" failed to work (A - 0%, B - 0%, C - 0%, D - 0%) due to a technical failure with the keypads, as a result of which Chris Tarrant asked the audience to pick up pre-prepared tablets with the letter of the correct, in their opinion, answer. Most raised the plate with the correct answer. This also happened on November 9, 2012 on Joe Pasquale & Phil Tufnell's £10,000 question. But, ironically, this incident happened on their fifth questions.
 * On October 1, 2000, the 100th episode, October 11, 2001 - the 200th episode, on November 30, 2002 - the 300th episode, on March 19, 2005 - the 400th episode and on March 18, 2008 - the 500th episode aired.