| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Star Wars Episode III: Revenge of the Sith (2005) | £3,313,328 | £8,360,758 | £32,665,110 | -39% | 3 |
| 2 (new) |  | Sin City (2005) | £2,452,299 | £2,452,299 | £2,452,299 | new | 1 |
| 3 (3) |  | The Pacifier (2005) | £834,179 | £2,075,332 | £2,804,402 | 13% | 2 |
| 4 (new) |  | The League of Gentlemens Apocalypse (2005) | £555,996 | £555,996 | £555,996 | new | 1 |
| 5 (4) |  | Monster-in-Law (2005) | £547,006 | £1,255,764 | £5,467,028 | -12% | 4 |
| 6 (2) |  | House of Wax (2005) | £539,915 | £1,281,654 | £2,046,662 | -29% | 2 |
| 7 (6) |  | Millions (1991) | £282,294 | £745,984 | £1,039,016 | -4% | 2 |
| 8 (5) |  | Kingdom of Heaven (2005) | £174,934 | £466,015 | £7,477,376 | -44% | 5 |
| 9 (8) |  | The Hitchhikers Guide to the Galaxy (2005) | £132,703 | £417,223 | £10,467,488 | -36% | 6 |
| 10 (7) | | It's All Gone Pete Tong (2005) | £131,191 | £398,645 | £673,161 | -52% | 2 |
| 11 (9) |  | Bunty Aur Babli (2005) | £96,231 | £234,715 | £384,355 | -36% | 2 |
| 12 (12) |  | Valiant (2005) | £81,366 | £245,490 | £8,397,737 | 41% | 11 |
| 13 (11) | | The Consequences of Love (2005) | £48,831 | £99,088 | £147,251 | 1% | 2 |
| 14 (re) |  | Robots (2005) | £42,839 | £42,839 | £12,303,922 | RE | 11 |
| 15 (13) |  | A Good Woman (2005) | £33,627 | £83,873 | £540,996 | -24% | 4 |