Best Picture:
* The King's Speech (2010)
* Shakespeare in Love (1998)
* Chariots of Fire (1981)
* Gandhi (1982) (British-Indian co-production)
Best Director:
* Anthony Hopkins (The Silence of the Lambs, 1991) (American-British co-production)
* Sam Mendes (American Beauty, 1999)
* Danny Boyle (Slumdog Millionaire, 2008) (British-Indian co-production)
* Steve McQueen (12 Years a Slave, 2013)
Best Actor:
* Daniel Day-Lewis (My Left Foot, 1989)
* Anthony Hopkins (The Silence of the Lambs, 1991) (American-British co-production)
* Colin Firth (The King's Speech, 2010)
* Eddie Redmayne (The Theory of Everything, 2014)
Best Actress:
* Emma Thompson (Howards End, 1992)
* Brenda Fricker (My Left Foot, 1989)
* Helen Mirren (The Queen, 2006)
Best Supporting Actor:
* Sir Alec Guinness (The Bridge on the River Kwai, 1957)
* Peter Finch (Network, 1976)
* Robert De Niro (Taxi Driver, 1976) (American-British co-production)
* Sir Michael Caine (Hannah and Her Sisters, 1986)
* Jim Broadbent (Iris, 2001)
* Sir Ben Kingsley (Gandhi, 1982) (British-Indian co-production)
* Christoph Waltz (Inglourious Basterds, 2009) (American-German co-production)
* Mark Rylance (Bridge of Spies, 2015)
* Sir Anthony Hopkins (The Father, 2020)
Best Supporting Actress:
* Dame Maggie Smith (California Suite, 1978)
* Peggy Ashcroft (A Passage to India, 1984)
* Miranda Richardson (Damage, 1992)
* Judi Dench (Shakespeare in Love, 1998)
* Cate Blanchett (The Aviator, 2004) (American-Australian co-production)
* Jennifer Ehle (The English Patient, 1996)
* Rachel Weisz (The Constant Gardener, 2005)
* Olivia Colman (The Favourite, 2018)
* Laura Dern (Marriage Story, 2019) (American-British co-production)
Best Adapted Screenplay:
* The King's Speech (2010)
* The English Patient (1996)
* Shakespeare in Love (1998)
* Room (2015)
* Atonement (2007)
* The Father (2020)
Best Original Screenplay:
* The Crying Game (1992)
* Slumdog Millionaire (2008)
* In Bruges (2008)
* Spotlight (2015) (American-British co-production)
Best Original Song:
* "Shallow" from A Star is Born (2018) (American-British co-production)
* "Can You Feel the Love Tonight" from The Lion King (1994) (American-British co-production)
* "Writing's on the Wall" from Spectre (2015)
Best Animated Feature:
* Wallace & Gromit: The Curse of the Were-Rabbit (2005)
Best Cinematography:
* American Beauty (1999)
* The Grand Budapest Hotel (2014)
* 1917 (2019)
Best Costume Design:
* Shakespeare in Love (1998)
* The Grand Budapest Hotel (2014)
* Phantom Thread (2017)
Best Film Editing:
* The English Patient (1996)
* The King's Speech (2010)
* Slumdog Millionaire (2008)
Best Production Design:
* The English Patient (1996)
* Shakespeare in Love (1998)
* The Grand Budapest Hotel (2014)
* The Lord of the Rings: The Return of the King (2003) (American-British co-production)
Best Sound Editing:
* The English Patient (1996)
* The Lord of the Rings: The Return of the King (2003) (American-British co-production)
Best Sound Mixing:
* The English Patient (1996)
* The Lord of the Rings: The Return of the King (2003) (American-British co-production)
* Slumdog Millionaire (2008)
Best Visual Effects:
* The Lord of the Rings: The Return of the King (2003) (American-British co-production)
* Gravity (2013) (American-British co-production)
* Blade Runner 2049 (2017) (American-British co-production)
Best Makeup and Hairstyling:
* The Grand Budapest Hotel (2014)
Best Documentary Feature:
* Free Solo (2018)
* Amy (2015)
Best Foreign Language Film:
* The Secret in Their Eyes (2009) (Argentine-Spanish-French co-production)
Other Notable Oscars:
* Best Original Score: The English Patient (1996)
* Best Adapted Score: The Lord of the Rings: The Return of the King (2003) (American-British co-production)
This list includes some co-productions where the British contribution was significant, though not the primary one.
Please note that this is not an exhaustive list, and there are many other British films that have received Oscar nominations.