This is the top 25 British films in the last 25 years according to The Guardian and their "expert panel of flim-makers and critics):- 

1. Trainspotting (1996)
2. Withnail & I (1987)
3. Secrets & Lies (1996)
4. Distant Voices, Still Lives (1988)
5. My Beautiful Laundrette (1985)
6. Nil By Mouth (1997)
7. Sexy Beast (2000)
8. Ratcatcher (1999)
9. Slumdog Millionaire (2008)
10. Four Weddings and a Funeral (1994)
11. Touching the Void (2003)
12. Hope and Glory (1987)
13. Control (2007)
14. Naked (1993)
15. Under the Skin (1997)
16. Hunger (2008)
17. This Is England (2006)
18. Shaun of the Dead (2004)
19. Dead Man's Shoes (2004)
20. Red Road (2006)
21. Riff-Raff (1981)
22. Man On Wire (2008)
23. My Summer of Love (2004)
24. 24 Hour Party People (2002)
25. The English Patient (1996)

Click here for the full gallery and write-up!