1990
| Date | Artist(s) | Song Title | Weeks at Number One |
|---|
| 7 January 1990 | New Kids on the Block | “Hangin’ Tough” | 2 |
| 21 January 1990 | Kylie Minogue | “Tears on My Pillow” | 1 |
| 28 January 1990 | Sinéad O’Connor | “Nothing Compares 2 U” | 4 |
| 25 February 1990 | Beats International featuring Lindy Layton | “Dub Be Good to Me” | 4 |
| 25 March 1990 | Snap! | “The Power” | 2 |
| 8 April 1990 | Madonna | “Vogue” | 4 |
| 6 May 1990 | Adamski | “Killer” | 4 |
| 3 June 1990 | Englandneworder | “World in Motion” | 2 |
| 17 June 1990 | Elton John | “Sacrifice” | 5 |
| 22 July 1990 | Partners in Kryme | “Turtle Power” | 4 |
| 19 August 1990 | Bombalurina | “Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini” | 3 |
| 9 September 1990 | The Steve Miller Band | “The Joker” | 2 |
| 23 September 1990 | Maria McKee | “Show Me Heaven” | 4 |
| 21 October 1990 | The Beautiful South | “A Little Time” | 1 |
| 28 October 1990 | The Righteous Brothers | “Unchained Melody” | 4 |
| 25 November 1990 | Vanilla Ice | “Ice Ice Baby” | 4 |
| 23 December 1990 | Cliff Richard | “Saviour’s Day” | 1 |
| 30 December 1990 | Iron Maiden | “Bring Your Daughter… to the Slaughter” | 2 |
1991
Here is a table of the UK number one singles in 1991, along with the duration they stayed at the top spot:
| Date Achieved | Artist(s) | Song Title | Weeks at Number One |
|---|
| 05/01/1991 | Iron Maiden | Bring Your Daughter… to the Slaughter | 2 |
| 19/01/1991 | Enigma | Sadness Part 1 | 1 |
| 26/01/1991 | Queen | Innuendo | 1 |
| 02/02/1991 | The KLF | 3AM Eternal | 2 |
| 16/02/1991 | The Simpsons | Do the Bartman | 3 |
| 09/03/1991 | The Clash | Should I Stay or Should I Go | 2 |
| 23/03/1991 | Hale and Pace | The Stonk | 1 |
| 30/03/1991 | Chesney Hawkes | The One and Only | 5 |
| 04/05/1991 | Cher | The Shoop Shoop Song (It’s in His Kiss) | 5 |
| 08/06/1991 | Color Me Badd | I Wanna Sex You Up | 3 |
| 29/06/1991 | Jason Donovan | Any Dream Will Do | 2 |
| 07/07/1991 | Bryan Adams | (Everything I Do) I Do It for You | 16 |
| 27/10/1991 | U2 | The Fly | 1 |
| 03/11/1991 | Vic Reeves and The Wonder Stuff | Dizzy | 2 |
| 17/11/1991 | Michael Jackson | Black or White | 2 |
| 01/12/1991 | George Michael and Elton John | Don’t Let the Sun Go Down on Me | 2 |
| 15/12/1991 | Queen | Bohemian Rhapsody / These Are the Days of Our Lives | 5 |