The full list of the Time Out poll is worth reading in extenso, with comments from top directors, actors, critics, etc. There are also links to other Time Out lists, including an animation list with comments by Terry Gilliam and a WWII list with comments by Quentin Tarantino.
1 Don't Look Now (1973) Dir Nicolas Roeg (Julie Christie, Donald Sutherland)
2 The Third Man (1949) Dir Carol Reed (Joseph Cotten, Orson Welles, Alida Valli)
3 Distant Voices, Still Lives (1988) Dir Terence Davies (Pete Postlethwaite, Freda Dowie)
4 Kes (1969) Dir Ken Loach (David Bradley, Lynne Perrie, Freddie Fletcher)
5 The Red Shoes (1948) Dirs Michael Powell, Emeric Pressburger (Moira Shearer, Anton Walbrook, Marius Goring)
6 A Matter of Life and Death (1946) Dirs Michael Powell, Emeric Pressburger (David Niven, Kim Hunter, Roger Livesey, Raymond Massey)
7 Performance (1970) Dirs Nicolas Roeg, Donald Cammell (James Fox, Mick Jagger, Anita Pallenberg)
8 Kind Hearts and Coronets (1949) Dir Robert Hamer (Dennis Price, Alec Guinness, Joan Greenwood)
9 If... (1968) Dir Lindsay Anderson (Malcom McDowell, David Wood, Richard Warwick)
10 Trainspotting (1996) Dir Danny Boyle (Ewan McGregor, Robert Carlyle, Jonny Lee Miller)
11 Naked (1993) Dir Mike Leigh (David Thewlis, Lesley Sharp, Karin Cartlidge)
12 Brief Encounter (1945) Dir David Lean (Trevor Howard, Celia Johnson)
13 The 39 Steps (1935) Dir Alfred Hitchcock (Robert Donat, Madeleine Carroll, Godfrey Tearle)
14 The Life and Death of Colonel Blimp (1943) Dirs Michael Powell, Emeric Pressburger (Roger Livesey, Deborah Kerr)
15 Withnail and I (1987) Dir Bruce Robinson (Richard E Grant, Paul McGann, Richard Griffiths)
16 Black Narcissus (1947) Dirs Michael Powell, Emeric Pressburger (Deborah Kerr, Sabu, David Farrar)
17 A Canterbury Tale (1944) Dirs Michael Powell, Emeric Pressburger (Eric Portman, Sheila Sim, John Sweet, Dennis Price)
18 The Innocents (1961) Dir Jack Clayton (Deborah Kerr, Michael Redgrave)
19 Barry Lyndon (1975) Dir Stanley Kubrick (Ryan O'Neal, Marisa Berenson, Patrick Magee)
20 Monty Python's Life of Brian (1979) Dir Terry Jones (Graham Chapman, John Cleese, Michael Palin, Eric Idle et al)
21 Nil by Mouth (1997) Dir Gary Oldman (Kathy Burke, Ray Winstone)
22 Saturday Night and Sunday Morning (1960) Dir Karel Reisz (Albert Finney, Rachel Roberts, Shirley Anne Field)
23 Lawrence of Arabia (1962) Dir David Lean (Peter O’Toole, Omar Sharif, Alec Guinness)
24 Brazil (1985) Dir Terry Gilliam (Jonathan Pryce, Robert De Niro, Katherine Helmond)
25 Great Expectations (1946) Dir David Lean (John Mills, Valerie Hobson, Martita Hunt)
26 I Know Where I'm Going! (1945) Dirs Michael Powell, Emeric Pressburger (Wendy Hiller, Roger Livesey)
27 The Bill Douglas Trilogy (1972, 1973, 1978) Dir Bill Douglas (Stephen Archibald, Hughie Restorick, Jean Taylor-Smith)
28 The Wicker Man (1973) Dir Robin Hardy (Edward Woodward, Christopher Lee, Britt Ekland)
29 Peeping Tom (1960) Dir Michael Powell (Karl Böhm, Anna Massey, Maxine Audley)
30 The Ladykillers (1955) Dir Alexander Mackendrick (Alec Guinness, Peter Sellers, Katie Johnson)
31 The Lady Vanishes (1938) Dir Alfred Hitchcock (Margaret Lockwood, Michael Redgrave)
32 Get Carter (1971) Dir Mike Hodges (Michael Caine, Britt Ekland, John Osborne)
33 Secrets and Lies (1996) Dir Mike Leigh (Brenda Blethyn, Timothy Spall, Marianne Jean-Baptiste)
34 A Clockwork Orange (1971) Dir Stanley Kubrick (Malcolm McDowell, Patrick Magee, Michael Bates)
35 The Servant (1963) Dir Joseph Losey (James Fox, Dirk Bogarde, Sarah Miles, Wendy Craig)
36 The Loneliness of the Long Distance Runner (1962) Dir Tony Richardson (Tom Courtenay, James Bolam, Julia Foster)
37 It Always Rains on Sunday (1947) Dir Robert Hamer (Googie Withers, Edward Chapman, John McCallum)
38 Went the Day Well? (1942) Dir Alberto Cavalcanti (Leslie Banks, Elizabeth Allan, Frank Lawton)
39 London (1994) Dir Patrick Keiller (voice of Paul Scofield)
40 Ratcatcher (1999) Dir Lynne Ramsay (William Eadie, Tommy Flanagan, Mandy Matthews)
41 Witchfinder General (1968) Dir Michael Reeves (Vincent Price, Patrick Wymark, Ian Ogilvy)
42 Listen to Britain (1942) Dir Humphrey Jennings
43 Fires Were Started (1941) Dir Humphrey Jennings
44 Sabotage (1936) Dir Alfred Hitchcock (Oscar Homolka, Sylvia Sidney, John Loder)
45 Repulsion (1965) Dir Roman Polanski (Catherine Deneuve, Yvonne Furneaux)
46 The Fallen Idol (1948) Dir Carol Reed (Ralph Richardson, Michèle Morgan, Bobby Henrey)
47 Blow-Up (1966) Dir Michelangelo Antonioni (David Hemmings, Vanessa Redgrave, Paul Bowles)
48 Hunger (2008) Dir Steve McQueen (Michael Fassbender, Liam Cunningham)
49 Gallivant (1996) Dir Andrew Kötting (Andrew Kötting, Eden Kötting, Gladys Morris)
50 Culloden (1964) Dir Peter Watkins (George McBean, Alan Pope, the people of Inverness)
51 Local Hero (1983) Dir Bill Forsyth (Burt Lancaster, Peter Riegert, Denis Lawson)
52 Robinson in Space (1997) Dir Patrick Keiller (Paul Scofield (voice))
53 This Sporting Life (1963) Dir Lindsay Anderson (Richard Harris, Rachel Roberts)
54 Monty Python and the Holy Grail (1974) Dirs Terry Gilliam, Terry Jones (Graham Chapman, Michael Palin, John Cleese, Eric Idle et al)
55 Radio-On (1980) Dir Chris Petit (David Beames, Lisa Kreuzer, Sandy Ratcliff)
56 Caravaggio (1986) Dir Derek Jarman (Nigel Terry, Sean Bean, Tilda Swinton)
57 2001: A Space Odyssey (1968) Dir Stanley Kubrick (Keir Dullea, Gary Lockwood, William Sylvester)
58 Gregory's Girl (1981) Dir Bill Forsyth (John Gordon Sinclair, Dee Hepburn, Claire Grogan)
59 Blackmail (1929) Dir Alfred Hitchcock (Anny Ondra, Sara Allgood, John Longden)
60 The Long Good Friday (1980) Dir John Mackenzie (Bob Hoskins, Helen Mirren, Derek Thompson)
61 Walkabout (1971) Dir Nicolas Roeg (Jenny Agutter, David Gulpilil, Lucien John)
62 Deep End (1970) Dir Jerzy Skolimowski (Jane Asher, John Moulder-Brown, Diana Dors)
63 Nuts In May (1976) Dir Mike Leigh (Roger Sloman, Alison Steadman)
64 Topsy-Turvy (1999) Dir Mike Leigh (Jim Broadbent, Allan Corduner, Timothy Spall)
65 Dracula (1958) Dir Terence Fisher (Peter Cushing, Christopher Lee, Michael Gough)
66 Wonderland (1999) Dir Michael Winterbottom (Gina McKee, Shirley Henderson, Molly Parker, John Simm)
67 Whisky Galore! (1949) Dir Alexander Mackendrick (Basil Radford, Joan Greenwood, Jean Cadell)
68 Dead of Night (1945) Dirs Alberto Cavalcanti, Charles Crichton, Basil Dearden, Robert Hamer (Mervyn Johns, Michael Redgrave, Roland Culver)
69 Oliver! (1968) Dir Carol Reed (Ron Moody, Shani Wallis, Oliver Reed)
70 Bad Timing (1980) Dir Nicolas Roeg (Art Garfunkel, Theresa Russell, Harvey Keitel)
71 Edvard Munch (1974) Dir Peter Watkins (Geir Westby, Gro Fraas, Iselin von Hanno Bart)
72 The Long Day Closes (1992) Dir Terence Davies (Marjorie Yates, Leigh McCormack, Anthony Watson)
73 The Man in the White Suit (1951) Dir Alexander Mackendrick (Alec Guinness, Joan Greenwood, Cecil Parker)
74 Four Weddings and a Funeral (1994) Dir Mike Newell (Hugh Grant, Andie MacDowell, Kristin Scott Thomas)
75 A Room for Romeo Brass (1999) Dir Shane Meadows (Paddy Considine, Andrew Shim, Ben Marshall)
76 Penda's Fen (1974) Dir Alan Clarke (Spencer Banks, John Atkinson, Ian Hogg)
77 Piccadilly (1929) Dir EA Dupont (Anna May Wong, Gilda Gray, Jameson Thomas)
78 Billy Liar (1963) Dir John Schlesinger (Tom Courtenay, Julie Christie, Wilfred Pickles)
79 The Offence (1972) Dir Sidney Lumet (Sean Connery, Trevor Howard, Vivien Merchant)
80 Under the Skin (1997) Dir Carine Adler (Samantha Morton, Claire Rushbrook, Rita Tushingham)
81 Dr No (1962) Dir Terence Young (Sean Connery, Ursula Andress, Joseph Wiseman)
82 Orlando (1993) Dir Sally Potter (Tilda Swinton, Billy Zane, John Wood)
83 A Cottage on Dartmoor (1929) Dir Anthony Asquith (Hans Adalbert von Schlettow, Uno Henning, Norah Baring)
84 Fish Tank (2009) Dir Andrea Arnold (Katie Jarvis, Kierston Wareing, Michael Fassbender)
85 I'm Alright Jack (1959) Dir John Boulting (Peter Sellers, Ian Carmichael, Terry-Thomas)
86 The Bridge on the River Kwai (1957) Dir David Lean (Alec Guinness, William Holden, Jack Hawkins)
87 Night and the City (1950) Dir Jules Dassin (Richard Widmark, Gene Tierney, Googie Withers)
88 This Is England (2006) Dir Shane Meadows (Thomas Turgoose, Stephen Graham, Jo Hartley)
89 The Go Between (1970) Dir Joseph Losey (Julie Christie, Alan Bates, Dominic Guard)
90 Blue (1993) Dir Derek Jarman (voices of Tilda Swinton, John Quentin, Nigel Terry)
91 Land and Freedom (1995) Dir Ken Loach (Ian Hart, Icíar Bollaín, Tom Gilroy)
92 Dead Man's Shoes (2004) Dir Shane Meadows (Paddy Considine, Gary Stretch, Toby Kebbell)
93 Zulu (1964) Dir Cy Endfield (Stanley Baker, Jack Hawkins, Michael Caine)
94 24 Hour Party People (2002) Dir Michael Winterbottom (Steve Coogan, Rob Brydon, Ron Cook)
95 London to Brighton (2006) Dir Paul Andrew Williams (Lorraine Stanley, Johnny Harris, Georgia Groome)
96 Theatre of Blood (1973) Dir Douglas Hickox (Vincent Price, Diana Rigg, Ian Hendry)
97 28 Days Later… (2002) Dir Danny Boyle (Cillian Murphy, Naomie Harris, Brendan Gleeson)
98 School for Scoundrels (1960) Dir Robert Hamer (Ian Carmichael, Alastair Sim, Terry-Thomas)
99 The Railway Children (1970) Dir Lionel Jeffries (Dinah Sheridan, William Mervyn, Jenny Agutter)
100 In This World (2002) Dir Michael Winterbottom (Jamal Udin Torabi, Enayatullah)